At this point so many letters are revealed that I won't add any more letters until more characters are guessed. Since the deadline for this round is Wed eve Pacific time, the clock could potentially run out before another letter is added.

731 Psi (Obsidian Platinum)
732 M Darby
733 Madison Danforth
734 Miller
735 Capitan Noriega
736 Gideon (Time Vault)
738 (listed as 638) Declan of The Smell
739 Mrs Fazekas
741 Mac (Obsidian Platinum)
742 Vita (Obsidian Platinum)
743 Mike the Spike
744 Ace (Second version, Earth-1 Royal Flush Gang)
745 Detective Kevin
746 Abra Kadabra (Phillipe)
747 Tim Kwon
748 Cyborg Superman (Hank Henshaw)
749 Mr Gardner
750 First Air Totem Bearer

757 Mike the Strike
758 Accelerated Man (Earth-19)

764 Unnamed Dominator (Earth-38)
765 Lachesis

767 Wells the Grey (Earth-13)

769 Multiplex (Danton Black)

771 Zeta-Rho

790 Harrison Wolfgang Wells (Earth-12)

793 Amunet Black

815 Batwoman / Ryan Wilder

818 Vertigo (Werner Zytle)
819 Kane Wolfman (Joe Wilson)

820 Lisa Gold

827 Dominator Queen

834 Doctor Light (Linda Park) Earth-2

838 Siren-X (Laurel Lance)

861 Mitch / Figure

896 Brick / Danny Brickwell

898 Grigori Rasputin / Mad Monk. 

900 Olivia Marsdin

910 Brainiac 5 (Barney Fife) Earth-TUD15

912 Amaya Jiwe's ancestor

915 Queen (Mona Taylor) Earth Prime's Royal Flush Gang

919 Ultraviolet (Esperanza Garcia)

958 Atom (Ryan Choi)

962 King (Derek Reston) of the Royal Flush Gang

972 Roy Stewart

976 Trajectory (Eliza Harmon)

983 Tar Pit (Joseph Monteleone) 

994 Cora Lewis

1005 Harrison Wells (Earth-1)

1017 Unnamed Dominator (Earth-1)

1021 Kopy

1025 Digsy Foss

1039 Sonny Wells (Earth-34)

1047 Ramesses II

1052 Jesse Presley

1060 The Rival (Edward Clariss)

1063 Al (Earth-TUD17)

1068 H. Lothario Wells (Earth-47)

1074 Gumball

1090 Derek Sampson

1097 Esi

Cleaned up clues:

734. Original; security agent; acted as security for an event TAYL*R  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
751. Original, but likely named after crew member; scientist/cultist; activities involve blood *. VA**K
752. Comics; assassin; Titans, though at least one earlier character used the same code name; aerokinesis power BRE*THT*KER [LOCKED; both remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
753. Original; student if any when last seen; a bully at least during youth T* [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
754. Original; unrevealed; brother of a bartender TREV*R *RANE
755. Original; club owner/illegal technology dealer; his club was described as  "an acid trip-techno freak show". AMNE**A*
756. Original (Arrowverse claims a comics connection but it's a reach) but related to comics based character; socialite; if going by Arrowverse claims, Huntress; kidnapped in 2040 B*AN*A BERT*NELL*
759. Original; government agent; killed by a criminal group he worked against ALAN *HANG [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
760. Original; some sort of school worker (saying more would revealed too much of the answer); managed an autumn recital V**E PR*N**PAL *F DAV** M*DDLE **H**L
761. Original; unrevealed; helped heroes find prisoners J* GUNRAF [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
762. Comics; police commissioner; Batman: The Dark Knight; killed by a criminal society **MM*****NER F*RBE*
763. Original; student/army agent; sole survivor of a clash with a hero's counterpart TAG HARR**
770. Original; unrevealed; roommate of speedster J*HANNA [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
772. Comics; CEO/crime syndicate leader; The Flash; killed by duplicate of late wife- J**EPH *ARVER
773. Comics; government agency secretary/mlitary colonel; Wonder Woman; attempted to force main character into government service after learning their identity **L*NEL LAUREN HALEY
774. Original; editor-in-chief; killed when a counterpart of an employee showed up ER** LARK*N
775. Comics; government agent; Batman; comics version had her own series; after villain escaped prison, investigated whether he had contacted his son upon escaping *AMER*N *HA*E
776. Original; councilman; car got covered in toilet paper HAR*LD GR*VNER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
777. Comics; head of security; The Brave and the Bold; comics version part of supporting cast for hero not yet seen in Arrowverse; this version killed by 769 *AVA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
779. Comics; unrevealed; Fury of Firestorm; wife of a superhero; met her future husband at a university mixer *LAR***A *TE*N
780. Original; police officer; wounded by member of first of three incarnatons of a gang *TAN W**H*NGT*N
781. Original; student (graduated); in one timeline she was the sole survivor of a killer's rampage T*FFANY HARPER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
782. Original; socialite; transformed into mummy before being killed MAR*A V*LK*VA
783. Original; crime family member; surname is crime family name FRANK *ANT*N*
784. Possibly comics at least for code name; gender swapped if so; criminal turned security guard; Forever Evil: A.R.G.U.S.; gained powers when they were transferred to him by another meta-human THE H*TNE** / JA** B*R*H
785. Original; unrevealed; survived a drug overdose AR*A  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
786. Comics; government agent; Green Lantern; activities during alien invasion got him demoted *M*TH
787. Original; Director of Tutoring; works at a community centre *MAN*  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
788. Original; unrevealed; got involved with cast character's boyfriend LE*-LAY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
791. Original; warrior; sent to Earth  after world's destruction PUR*TY / JUL*A FREEMAN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
792. Original; art smuggler; was in a prison that crashed to Earth M*NDR*X [LOCKED; both remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
794. Earlier show; military lieutenant;  Lois & Clark: The New Adventures of Superman; interrogation specialist JA**N TRA*K
795. Original; attorney; threatened and tortured by main character T*NY DAN*EL
796. Comics; unrevealed; Hellblazer; abusive father of cast character T*MMY **N*TANT*NE
798. Original; criminal (posed as security agent); infiltrated a humanitarian gala ***TT KA**ER
799. Original; unrevealed; abused by husband KAREN JAME*  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
800. Original; unrevealed; aunt of cast character T*LDA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
801. Comics, though almost for sure different surname; model; Batman; former cast character was brainwashed into believing she was her; daughter of major villain **R*E ***N**
802. Real person; mobster/club owner; died in 1947 but later revived BENJAM*N "BUG*Y" **EGEL
803. Original; vehicle company owner; killed by super-villain B*KER (E*RTH-38) [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
804. Original; biochemist; killed by gorilla JEFFREY *H*RE
805. Comics (indirectly); unrevealed to the extent applicable; Action Comics; held hostage KARA DANVER* (*B**D*AN PLAT*NUM)
806. Original; terrorist; attempted to kill ex-girlfriend NATAL*E HAWK*NG*
807. Original; criminal; worked for 896 GUNMAN / J*M HUFFMAN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
810. Original; outlaw/gang leader; active in 19th century JEB *T*LLWATER
811. Comics; assassin; probably Batwoman; has done missions in Jakarta, Metropolis, and Gotham THE R*FLE [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
812. Comics; business manager; Batman; apparently seen in afterlife; father of cast character LU**U* F*X
813. Original; crime boss; has history with cold themed criminal V*N*ENT *ANT*N*
814. Comics; criminal; 52; can shape-shift into any person with whom he has come into physical contact.  EVERYMAN / HANN*BAL BATE*
816. Real person; pilot; abducted during flight around the globe AMEL*A EARHART  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
817. Original; lab technician; killed by recurring super-villain J*E WATK*N*
822. Comics (comics version's real name unrevealed); criminal arms dealer; Green Lantern; code name is also weapon of choice JAVEL*N / MAL**LM BYRD
823. Original; social networking platform employee; killed by major villain who used his corpose as a sounding board ALAN (UP*W*PZ EMPL*YEE)
824. Original; CEO's assistant (specifically 772) MAUR**E
828. Original; unrevealed; has crush on female (but apparently heterosexual) cast character AND* **TERGAARD
829. Earlier character this continuity; unrevealed; seen only in hologram HARR***N *HERL*QUE WELL*' *E**ND EX-W*FE (EARTH-TUD9)
830. Original; student; participated in talent show *VERY PH*N  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
831. Comics (possibly); criminal; Tom Strong or The Silencer Annual if so (if the latter, code name has extra word in show); only seen in prison GR*M REAPER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
832. Original; unrevealed; provided info to cast character G*RRETT H*LL  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
833. Original; priestess; helped try to remake the Earth into the image of her home planet *Y*L*  [LOCKED; all remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
836. Comics; test subject; Supergirl for closest match, though earlier characters of this type exist; transformed brain trauma patient B*ZARR* / JANE D*E
837. Comics; criminal; Firestorm; can transform into substance of first word in code name *AND DEM*N / EDD*E *L**K (EARTH-2)
839. Comics but gender swapped so slightly different first name; prison maintenance worker/criminal; Action Comics; continued a super-villain's work after his death JA*QUEL*NE N*MBALL
840. Original; district attorney; attended a support group for people who had been sent to a specific other world *TEVEN LEE  [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
841. Real person; film director; real version created a character (reptilian monster) who remains prominent to this day **H*R* H*NDA (one letter has accent)
842. Original; unrevealed; father of 830 DU* PHAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
844. Original; middle school student; bullied recurring character ER*KA M*RR***N
846. Original; student; extra-terrestrial who had xenophobic professor NAT**NAL **TY UN*VER**TY *TUDENT
847. Original; unemployed when seen; had trouble finding work due to being an extra-terrestrial KE**E KAY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
849. Comics; police officer; More Fun Comics; comics version is a ghostly superhero; another character with same name seen on Constantine (the series) J*M **RR*GAN
851. Comics; toy shop owner/serial bomber; Doom Patrol; comics version can explode his body but this version non-powered *HRAPNEL / MARK **HEFFER
852. Original; firefighter; blamed cast character for bringing super-villain to the city R*BB*E ALVAREZ
853. Real person (though this version's surname unconfirmed); robber; part of a prominent duo B*NN*E (surname probably PARKER)
854. Original; unrevealed; falsely convicted of wife's murder PETER DE*LAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
855. Radio show (slightly different real name); sales associate/arsonist; neo-Nazi; The Adventures of Superman AT*M-MAN / HENRY M*LLER
856. Original; unrevealed; killed by legacy villain *MBER [LOCKED; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
857. Original; judge; refused to issue search warrant foir drug dealer's apartment P*TT**N
858. Comics (different code name or different real name depending on how you look at it); criminal/hacker; Adventure Comics (closest match among those with same code names), Justice League of America (variation of real name); killed a recurring character (offscreen) E*H* / ***** R*M*N (E*RTH-19)
859. Original; missionary; prisoner with pet rat TH*M** FLYNN
860. Real person; national president; 21st century leader though seen before becoming President; attacked by gorilla in 1979 BARA*K *BAMA
862. Original; housewife; close relative of cast character; **PH*E M**RE'* M*THER (note: originally listed in Arrowverse Wiki as D*ANE M**RE; I'll accept either name)
863. Original; businessman; embezzled money but returned 70 million after visit from cast character NEL**N RAV**H
864. Original; police detective; helped lead kidnapping rescue T*M PATTER**N
865. Original; apparent criminal; telepath P*Y*H** F*RT R*ZZ E**APEE
866. Original; attorney; worked for chemical firm JARED *WAN*TR*M
867. Original; businesswoman/co-CEO; mother of reformed super-villain RA*HEL RATHAWAY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
868. Original; bank employee; framed for robbery N*NA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
869. Movie (mentioned); housewife; Superman: The Movie; killed in car accident Pre-Crisis but alive Post-Crisis EVE TE**HMA*HER'* M*THER
870. Comics (indirectly); government agent to the extent applicable; Action Comics; in artificial world and tried to cast cast character in his world BRA*NY / QUERL D*X (*B**D*AN PLAT*NUM)
871. Original; businessman; killed by mercenary ERL**H KEL**
872. Original but parody of real person; DJ; ex-boyfriend of cast character *'M*RE M*NEY
873. Religion (so depending on beliefs real person); comics as separate being from a better known name; some sort of ruler; under this name, possibly The Hebrew Bible, possibly specifically Deuteronomy or Book of Proverbs being first mention or maybe Apocrypha; demon who made a deal with cast character BEL*AL
874. Stage musical; newspaper employee; It's a Bird...It's a Plane...It's Superman; managed to remain at work while co-workers were being laid off MAX MEN*KEN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
876. Original but named after two real people; photographer; named after a famous comics duo who created a major Marvel character **M*N K*RBY
877. Comics; criminal; The Flash; can create portals M*RR*R MA*TER / *AM **UDDER
878. Original but made to look like earlier character based on comics; unrevealed to the extent applicable; from a musical reality T*MMY M*RAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
879. Original; bowler; part of 757's team *LARE THE *PARE
880. Comics (but missing suffix); henchman; Action Comics; alien who worked for major alien villain T*R  [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
881. Original; police officer/terrorist; killed by his role in an extra-terrestrial's death DEA* PETR**ELL*
882. Original; criminal; worked for 896 J**E ANT*N
883. Original; housewife; cousin of cast character B*T**E TE**HMA*HER
885. Original; councilwoman; briefly gained the power to alter reality JEAN RANK*N  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
887. Comics (mix of two characters, one by name, the other by role); housewife; The Flash going by name, possibly same for role; mother of major villain A*HLEY Z*L*M*N
888. Comics; some sort of group leader; vampire JLA L*RD *RU**FER (EARTH-TUD*)
889. Original; likely minor criminal; offered later cast character a chance to join him in a get rich scheme EARL **X
891. Original; unrevealed; mother of someone who can transform into a creature L*EN WU  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQUVWXZ12349]
893. Real person; unrevealed (real version was domestic servant); mother of famous author *ARAH NEAL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
894. Original; unrevealed; former foster mother for cast character's daughter M*. NAVE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
895. Original; drug supplier; supplied major villain with special drug MAR*HALL KATZ  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
899. Original; advanced technology company employee; killed himself after being fired from VR firm he was obsessed with T*DD *APPH*RE
901. Original; unrevealed; survived the destruction of his planet L*R-AL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
902. Real person; army commander; led army against the Roman Republic *PARTA*U*
904. Comics; businesswoman/head of branch of advanced technology company/owner and  editor-in-chief/assassin; Superman Annual; has been both ally and adversary to heroes; put a reporter's name on a story she wrote, with unintended consequences A*RATA / ANDREA R**A*
905. Comics if just going by code name, but earlier show by code name and theme (different real name in both cases); prison worker (exact type is his code name)/vigilante; Detective Comics or Gotham; targeted superiors who made huim execute innocent inmates for personal gain EXE*UT**NER / BERTRAND ELD*N
906. Comics; mercenary; More Fun Comics W*LL*AM GLENM*RGAN
907. Comics; criminal; Detective Comics N**TURNA / NATAL*A KN*GHT
908. Original; unrevealed PRUDEN*E HAWTH*RNE
909. Original; test subject *UBJE*T 0331 / ADAM
911. Original; double agent J. M*G*LL
913. Original; attorney GREG *URK  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
914. Original; some sort of employer to the extent applicable ZAR*'* B***
916. Original; student if any TY**N
917. Comics (comics version's first name unknown); unrevealed; Green Arrow: Year One *AM HA*KETT
918. Original; soldier ADAM *REYKE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
920. Earlier show (photos only); doctor/plastic surgeon/philanthropist/university professor/criminal; Gotham; pivotal figure in major villain's origin *ATERP*LLAR a.k.a. ETHAN *AMPBELL / AUGU*T *ARTWR*GHT
921. Original; unrevealed D*NA *ALVAT*
922. Original; slave *BR*H*M [LOCKED; all remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
923. Original; high school student/vigilante; son of a major hero J*RDAN KENT  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
924. Comics; mercenary; Green Lantern JA*KHAMMER  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
925. Possibly comics but a bit of a reach; police detective; Detective Comics if comics, Batman using surname B*LLY MAL*NE
927. Real person; soldier turned author; works have been turned into many movies J.R.R. T*LK*EN
928. Earlier show; criminal; Batman: The Animated Series; wife of major comics villain N*RA FR*E*
929. Comics; criminal/CEO/real estate mogul; Superman's Pal, Jimmy Olsen; first of two times this character was adapted into the Arrowverse M*RGAN EDGE (EARTH-38)  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
930. Original; district attorney D*AZ  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
931. Original but related to comics based character; student, terrorist turned peace activist GE*RGE L**KW**D
932. Original; unrevealed **ENE *LAYT*N
933. Original; villager MA*AK* YAMA*H*R*
935. Original; mercenary arsonist J*N **RTEZ
936. Original; barista/server NATAL*E  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
937. Original; vigilante/computer technician/custodian/car wash attendant *AV**R / J**EPH FALK
938. Original; waitress MAR**A
939. Comics; senator; Suicide Squad J**EPH *RAY
940. Original; drug lord H*DE* YAMANE
943. Comics; agency director; Action Comics; counterpart of cast character but gender swapped thus not the same actor BRA*N*A* # / QUERL D*X (EARTH-TUD1#)
944. Original; technology firm employee/crime syndicate member M*L**LM *TR*MB*RD
945. Comics; mercenary; Savage Hawkman; comics version is a legacy villain *HAD*W TH*EF / AV*VA METULA
946. Original; student if any PA*GE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
947. Original; unrevealed L*RD KN*X**R*LL**N
949. Original; some sort of capturer (can't be more speific without revealing part of "name") AM*AX B*UNTY HUNTER
950. Comics but gender swapped, so slightly different first name; doctor; Adventures of Superman AMEL*A HAM*LT*N
951. Demonology; unrevealed if applicable; possibly Ars Goetia MAR*H*****
952. Comics but gender swapped (comics version real name unknown); thief; Hawkman NULL a.k.a. *UBJE*T 11 / JANET PETTY
953. Original; temporal agent REYE*  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
954. Original; arms industry and defense contractor company employee DE*N DEVER*UX  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
955. Original; unrevealed J*EY DAV**
956. Original; unrevealed AMÉL*E  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
957. Original; family restaurant co-owner RU***
960. Comics; reporter; Action Comics; married to a different person than her Earth-Prime counterpart L*** LANE (EARTH-TUD22)
961. Comics; army intelligence officer/government commission member, interim police captain; The Flash Secret Files and Origins KR**TEN KRAMER
964. Mythology; prophet of sorts; Greek mythology ATR*P**
965. Shares surname (minus one letter) with comics character who fought the same hero but appearently actually named after two characters from non-DC show, making him essentially Original; crime leader V*N*ENT *TEELGRAVE
966. Comics; security agent/criminal gang member; Batwing RU**ELL TAVAR*FF
967. Original; unrevealed ER*KA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
968. Comics; streamer/scientist/tech consultant; The Flash; comics version has a code name that is probably now non-PC *HE*TER P. RUNK
969. Comics (comics version's first name unknown); weapons dealer; Huntress B*BB* M*RETT*
970. Original; instituion worker (can't be more specific without revealing "name") ARKHAM A*YLUM NUR*E  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
971. Original; some sort of business head (can't be more specific without revealing "name") *E* *F **LVERM*NE HEALTH *N*URAN*E
973. Original; security agent BANK*  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
974. Earlier character this continuity; unrevealed if any AVA PR*ME  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
975. Original; student M*RGAN      [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
977. Original; crime boss LU**AN* ***TA
978. Original; cult leader *NH LY  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
979. Possible amalgmation of two comics characters; unrevealed; if comics, both from the same issue of The Flash FRAN**NE WE*T
980. Original; police captain/police detective K*MBERLY H*LL  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
981. Original; crime captain V*KT*R
982. Comics; blackjack dealer/bank robber; Infinity Inc. HAZARD / BE*KY *HARPE
984. Original; government agent/terrorist TAYL*R  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
985. Original; football player tight end turned criminal T*TAN / T*M TE*L*W
986. Original; engineer *ARL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
987. Original; unrevealed ADAM H*FFMAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
988. Real person (indirectly); possible inventor/businessman if applicable TH*MA* ED***N (R*B*T)
990. Original; unrevealed JAKE DAVENP*RT  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
991. Original; unrevealed EMER**N FA*RWEATHER
992. Original in terms of names but power set apparently close to a comics character with different name; gender swapped if counterpart; blogger/junior reporter *PEN*ER **UNG
993. Comics; bartender; probably Hellblazer M*RY *NNE  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
995. Comics; terrorist; JLA *RMEK [LOCKED; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
996. Original; weapons supplier KLAU* MARK**
997. Original; unrevealed; mother of cast character KATHER*NE GRANT  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
998. Original, though aludes to being part of a comics character's legacy; executive vice president/CEO; related to two cast characters MARQU** JET
999. Original; night club owner ER** *ART*ER
1000. Original; military general ALPH*N** TRAN
1001. Possible counterpart of comics character with different name; barkeep; possibly Constantine: The Hellblazer DE*M*ND
1002. Original; crime boss/shipping port facility owner JERRY BERT*NELL*  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
1003. Original; government divisiion director *H*P ***PER
1004. Original; police lieutenant *AM **NAHAN
1006. Original; unrevealed NA*M* WHEELER
1007. Original; assistant district attorney ANG** *TANT*N
1008. Original; unrevealed J*E B*ARDMAN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
1011. Comics; unrevealed; New Teen Titans MAGENTA / FRANK*E KANE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1013. Original; high school student DEN**E *L*WE
1014. Movie; priestess/judicator/council member; Supergirl *ELENA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1015. Original; CEO/businessman JAME* H*LDER
1016. Movie apparently; unrevealed; Superman II; played by an actor from a Star Trek series EARTH-38 D**M*DA* PR*TE*T*R
1018. Original; house staff RA**A
1019. Earlier character this continuity; temporal agent to the extent applicable E*PERANZA *RUZ (R*B*T)
1020. Original; unrevealed *M*ND* [LOCKED; all remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
1022. Real person; novelist JANE AU*TEN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
1023. Original; crime leader ZH**HAN
1026. Original; unrevealed GL*R*A *RUZ
1027. Gender swapped version of comics character despite other versions of the character who aren't gender swapped also existing; gangster/black market arms dealer; Showcase J*HN L*R*NG
1029. Comics; crime boss; probably Huntress P*N* BERT*NELL*
1030. Original; musician *AN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1031. Original; used car salesman DE*N *WEN*
1032. Original; nation ruler T*R DEGAT*N  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1033. Original; crime boss REM*NGT*N ME**TER
1034. Comics; district attorney; Manhunter KATE *PEN*ER
1035. Comics; editor-in-chief; The Brave and the Bold; in name only version of comics character, who was a teenage mascot *NAPPER *ARR
1040. Original; university professor ALDU* B*ARDMAN
1041. Comics; scientist; Firestorm JA**N RU**H
1042. Comics; criminal; The Flash *L*VE Y*RK*N
1043. Comics; game show host turned criminal; Detective Comics; one of the few Arrowverse villains to be actually shown putting characters into a traditional comics style deathtrap (maybe even the only such character) *LUEMA*TER / ARTHUR BR*WN
1044. Original; apparent criminal B*R**
1045. Original; criminal JUL*U*
1048. Original; unrevealed GRA*E G*BB*N*' FATHER
1049. Original; unrevealed MA**N
1050. Original; undercover agent/freelance IT specialist JENNY J*HN**N
1051. Real person; physicist MAR*E *UR*E
1053. Original; CEO JANET *ARR*LL
1054. Original but name refers to two real people; criminal *ARM*NE BR**ME
1055. Earlier character this continuity; unrevealed V*TA'* EARTH-TUD1# D*PPELGÄNGER)
1056. Original; art thief BA*T*AN *TRAYD
1057. Race from mythology; camp counselor; race from  Albanian mythology UNNAMED *HTR*GA / "*HAD *TEPHEN*"
1058. Original; influencer VER*N**A MAY / MYRT** D*NKER
1059. Original; government agent VAN*E BRAND*N
1062. Comics (different code name); lawyer/serial killer; Green Arrow: The Longbow Hunters; comics version operated out of Seattle *TARL*NG *LA*HER / R**HARD
1065. Original; actress PAM *HARPE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1066. Original; technology firm employee KARLA GR*VE*
1067. Original; technician DAV*D RUTENBERG  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1069. Original; terrorist/technology firm employee MARG*T M*RR***N
1070. Earlier character this continuity; some sort of cook *HEF AVA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1073. Comics; political decoy/bodyguard; Action Comics; two other versions of this character have been prominently seen in non-Arrowverse live action series HUMAN TARGET / *HR**T*PHER *HAN*E
1075. Comics (indirectly); criminal of sorts; Showcase; replaced another character for an extended period of time *R** WE*T-*LLEN (M*RR*RVER*E)
1076. Original; nightclub employee BE*KY  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
1077. Original; head of PR *HARL*E *LARKE
1078. Comics (different first name); unrevealed; The Flash B*G **R / DAV*D RAT*HET
1079. Original; CTO/hacktivist/tech store employee; has strong ties to cast character K*J* *LEDGEH*MMER / ALENA WH*TL**K
1080. Original; police detective M*KENNA HALL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1081. Comics; police sergeant/criminal; Flash Comics; killed by antimatter D*NAH DRAKE (EARTH-2)  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1082. Original; crime syndicate member/army special ops member *UN*H*NE / M*LL*E RAWL*N*
1083. Comics; bank robber; The Flash *LYDE MARD*N
1084. Original; unrevealed REGG*E HARR**'* GRANDM*THER
1085. Comics (amalgmation of two characters); unrevealed; New Teen Titans and New Teen Titans Annual MAYA RE**K
1088. Original; Chief of Staff *ARAH WALKER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1089. Origina; judge; JUDGE T*N*K*  [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
1091. Comics; unrevealed; Action Comics BRA*N*A* # (EARTH-TUD18)
1092. Original; scientist RAND *'RE*LLY
1093. Comics; princess; Captain Atom N**R HARJAVT*
1095. Original; some sort of bearer (being specific would reveal answer) F*R*T WATER T*TEM BEARER
1096. Comics; crime godfather; Outsiders **HMAEL GREG*R
1098. Comics; pet; Action Comics; no actual appearance, seen only in room constructed by main character's memories *TREAKY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1100. Original; scientist DR. DE*M*ND RAAB
1101. Comics; welder; All-Star Squadron; comics version is a superhero AL R*TH*TE*N (EARTH-1)

 

734 Taylor
751 I. Vasak
752 Breathtaker
753 Ty

761 Jo Gunraf

770 Johanna
772 Joseph Carver
773 Colonel Lauren Haley
774 Eric Larkin
775 Cameron Chase

794 Jason Trask

816 Amelia Earhart

836 Bizarro (Jane Doe)
837 Sand Demon (Eddie Slick)

860 Barack Obama

872 S'more Money

883 Bitsie Tessmacher

899 Todd Sapphire

904 Acrata (Andrea Rojas)
905 Executioner (Bertrand Eldon)

907 Nocturna (Natalia Knight)
908 Prudence Hawthorne

929 Morgan Edge (Earth-38)

931 George Lockwood
932 Irene Clayton
933 Masako Yamashira

946 Paige
947 Lord Knoxicrillion

949 Amlax Bounty Hunter

951 Marchosias

954 Dean Devereaux
955 Joey Davis

967 Erika

977 Luciano Costa

988 Thomas Edison

998 Marquis Jet
999 is not Eric Cartier. He might be the hands that are visible under Pam Sharpe, who's accidentally duplicated here.
1000 Alphonso Tran

1011 Magenta (Frankie Kane)

1022 Jane Austen
1023 Zhishan

1033 Remington Meister

1043 Cluemaster (Arthur Brown)
1044 Boris
1045 Julius

1058 Veronica May (Myrtis Dinker)
1059 Vance Brandon

1065 Pam Sharpe (I presume this is meant to be where she goes)
1066 Karla Groves
1067 David Rutenberg

1073 Human Target (Christopher Chance)

1078 Big Sir (David Ratchet)
1079 Kojo Sledgehammer (Alena Whitlock)

1082 Sunshine (Millie Rawlins)

1085 Maya Resik

1095 First Water Totem Bearer

1101 Al Rothstein (Earth-1)

Cleaned up main clues:

754. Original; unrevealed; brother of a bartender TREV*R *RANE
755. Original; club owner/illegal technology dealer; his club was described as  "an acid trip-techno freak show". AMNE**A*
756. Original (Arrowverse claims a comics connection but it's a reach) but related to comics based character; socialite; if going by Arrowverse claims, Huntress; kidnapped in 2040 B*AN*A BERT*NELL*
759. Original; government agent; killed by a criminal group he worked against ALAN *HANG [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
760. Original; some sort of school worker (saying more would revealed too much of the answer); managed an autumn recital V**E PR*N**PAL *F DAV** M*DDLE **H**L
762. Comics; police commissioner; Batman: The Dark Knight; killed by a criminal society **MM*****NER F*RBE*
763. Original; student/army agent; sole survivor of a clash with a hero's counterpart TAG HARR**
776. Original; councilman; car got covered in toilet paper HAR*LD GR*VNER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
777. Comics; head of security; The Brave and the Bold; comics version part of supporting cast for hero not yet seen in Arrowverse; this version killed by 769 *AVA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
779. Comics; unrevealed; Fury of Firestorm; wife of a superhero; met her future husband at a university mixer *LAR***A *TE*N
780. Original; police officer; wounded by member of first of three incarnatons of a gang *TAN W**H*NGT*N
781. Original; student (graduated); in one timeline she was the sole survivor of a killer's rampage T*FFANY HARPER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
782. Original; socialite; transformed into mummy before being killed MAR*A V*LK*VA
783. Original; crime family member; surname is crime family name FRANK *ANT*N*
784. Possibly comics at least for code name; gender swapped if so; criminal turned security guard; Forever Evil: A.R.G.U.S.; gained powers when they were transferred to him by another meta-human THE H*TNE** / JA** B*R*H
785. Original; unrevealed; survived a drug overdose AR*A  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
786. Comics; government agent; Green Lantern; activities during alien invasion got him demoted *M*TH
787. Original; Director of Tutoring; works at a community centre *MAN*  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
788. Original; unrevealed; got involved with cast character's boyfriend LE*-LAY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
791. Original; warrior; sent to Earth  after world's destruction PUR*TY / JUL*A FREEMAN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
792. Original; art smuggler; was in a prison that crashed to Earth M*NDR*X [LOCKED; both remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
795. Original; attorney; threatened and tortured by main character T*NY DAN*EL
796. Comics; unrevealed; Hellblazer; abusive father of cast character T*MMY **N*TANT*NE
798. Original; criminal (posed as security agent); infiltrated a humanitarian gala ***TT KA**ER
799. Original; unrevealed; abused by husband KAREN JAME*  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
800. Original; unrevealed; aunt of cast character T*LDA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
801. Comics, though almost for sure different surname; model; Batman; former cast character was brainwashed into believing she was her; daughter of major villain **R*E ***N**
802. Real person; mobster/club owner; died in 1947 but later revived BENJAM*N "BUG*Y" **EGEL
803. Original; vehicle company owner; killed by super-villain B*KER (E*RTH-38) [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
804. Original; biochemist; killed by gorilla JEFFREY *H*RE
805. Comics (indirectly); unrevealed to the extent applicable; Action Comics; held hostage KARA DANVER* (*B**D*AN PLAT*NUM)
806. Original; terrorist; attempted to kill ex-girlfriend NATAL*E HAWK*NG*
807. Original; criminal; worked for 896 GUNMAN / J*M HUFFMAN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
810. Original; outlaw/gang leader; active in 19th century JEB *T*LLWATER
811. Comics; assassin; probably Batwoman; has done missions in Jakarta, Metropolis, and Gotham THE R*FLE [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
812. Comics; business manager; Batman; apparently seen in afterlife; father of cast character LU**U* F*X
813. Original; crime boss; has history with cold themed criminal V*N*ENT *ANT*N*
814. Comics; criminal; 52; can shape-shift into any person with whom he has come into physical contact.  EVERYMAN / HANN*BAL BATE*
817. Original; lab technician; killed by recurring super-villain J*E WATK*N*
822. Comics (comics version's real name unrevealed); criminal arms dealer; Green Lantern; code name is also weapon of choice JAVEL*N / MAL**LM BYRD
823. Original; social networking platform employee; killed by major villain who used his corpose as a sounding board ALAN (UP*W*PZ EMPL*YEE)
824. Original; CEO's assistant (specifically 772) MAUR**E
828. Original; unrevealed; has crush on female (but apparently heterosexual) cast character AND* **TERGAARD
829. Earlier character this continuity; unrevealed; seen only in hologram HARR***N *HERL*QUE WELL*' *E**ND EX-W*FE (EARTH-TUD9)
830. Original; student; participated in talent show *VERY PH*N  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
831. Comics (possibly); criminal; Tom Strong or The Silencer Annual if so (if the latter, code name has extra word in show); only seen in prison GR*M REAPER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
832. Original; unrevealed; provided info to cast character G*RRETT H*LL  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
833. Original; priestess; helped try to remake the Earth into the image of her home planet *Y*L*  [LOCKED; all remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
839. Comics but gender swapped so slightly different first name; prison maintenance worker/criminal; Action Comics; continued a super-villain's work after his death JA*QUEL*NE N*MBALL
840. Original; district attorney; attended a support group for people who had been sent to a specific other world *TEVEN LEE  [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
841. Real person; film director; real version created a character (reptilian monster) who remains prominent to this day **H*R* H*NDA (one letter has accent)
842. Original; unrevealed; father of 830 DU* PHAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
844. Original; middle school student; bullied recurring character ER*KA M*RR***N
846. Original; student; extra-terrestrial who had xenophobic professor NAT**NAL **TY UN*VER**TY *TUDENT
847. Original; unemployed when seen; had trouble finding work due to being an extra-terrestrial KE**E KAY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
849. Comics; police officer; More Fun Comics; comics version is a ghostly superhero; another character with same name seen on Constantine (the series) J*M **RR*GAN
851. Comics; toy shop owner/serial bomber; Doom Patrol; comics version can explode his body but this version non-powered *HRAPNEL / MARK **HEFFER
852. Original; firefighter; blamed cast character for bringing super-villain to the city R*BB*E ALVAREZ
853. Real person (though this version's surname unconfirmed); robber; part of a prominent duo B*NN*E (surname probably PARKER)
854. Original; unrevealed; falsely convicted of wife's murder PETER DE*LAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
855. Radio show (slightly different real name); sales associate/arsonist; neo-Nazi; The Adventures of Superman AT*M-MAN / HENRY M*LLER
856. Original; unrevealed; killed by legacy villain *MBER [LOCKED; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
857. Original; judge; refused to issue search warrant foir drug dealer's apartment P*TT**N
858. Comics (different code name or different real name depending on how you look at it); criminal/hacker; Adventure Comics (closest match among those with same code names), Justice League of America (variation of real name); killed a recurring character (offscreen) E*H* / ***** R*M*N (E*RTH-19)
859. Original; missionary; prisoner with pet rat TH*M** FLYNN
862. Original; housewife; close relative of cast character; **PH*E M**RE'* M*THER (note: originally listed in Arrowverse Wiki as D*ANE M**RE; I'll accept either name)
863. Original; businessman; embezzled money but returned 70 million after visit from cast character NEL**N RAV**H
864. Original; police detective; helped lead kidnapping rescue T*M PATTER**N
865. Original; apparent criminal; telepath P*Y*H** F*RT R*ZZ E**APEE
866. Original; attorney; worked for chemical firm JARED *WAN*TR*M
867. Original; businesswoman/co-CEO; mother of reformed super-villain RA*HEL RATHAWAY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
868. Original; bank employee; framed for robbery N*NA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
869. Movie (mentioned); housewife; Superman: The Movie; killed in car accident Pre-Crisis but alive Post-Crisis EVE TE**HMA*HER'* M*THER
870. Comics (indirectly); government agent to the extent applicable; Action Comics; in artificial world and tried to cast cast character in his world BRA*NY / QUERL D*X (*B**D*AN PLAT*NUM)
871. Original; businessman; killed by mercenary ERL**H KEL**
873. Religion (so depending on beliefs real person); comics as separate being from a better known name; some sort of ruler; under this name, possibly The Hebrew Bible, possibly specifically Deuteronomy or Book of Proverbs being first mention or maybe Apocrypha; demon who made a deal with cast character BEL*AL
874. Stage musical; newspaper employee; It's a Bird...It's a Plane...It's Superman; managed to remain at work while co-workers were being laid off MAX MEN*KEN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
876. Original but named after two real people; photographer; named after a famous comics duo who created a major Marvel character **M*N K*RBY
877. Comics; criminal; The Flash; can create portals M*RR*R MA*TER / *AM **UDDER
878. Original but made to look like earlier character based on comics; unrevealed to the extent applicable; from a musical reality T*MMY M*RAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
879. Original; bowler; part of 757's team *LARE THE *PARE
880. Comics (but missing suffix); henchman; Action Comics; alien who worked for major alien villain T*R  [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
881. Original; police officer/terrorist; killed by his role in an extra-terrestrial's death DEA* PETR**ELL*
882. Original; criminal; worked for 896 J**E ANT*N
885. Original; councilwoman; briefly gained the power to alter reality JEAN RANK*N  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
887. Comics (mix of two characters, one by name, the other by role); housewife; The Flash going by name, possibly same for role; mother of major villain A*HLEY Z*L*M*N
888. Comics; some sort of group leader; vampire JLA L*RD *RU**FER (EARTH-TUD*)
889. Original; likely minor criminal; offered later cast character a chance to join him in a get rich scheme EARL **X
891. Original; unrevealed; mother of someone who can transform into a creature L*EN WU  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQUVWXZ12349]
893. Real person; unrevealed (real version was domestic servant); mother of famous author *ARAH NEAL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
894. Original; unrevealed; former foster mother for cast character's daughter M*. NAVE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
895. Original; drug supplier; supplied major villain with special drug MAR*HALL KATZ  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
901. Original; unrevealed; survived the destruction of his planet L*R-AL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
902. Real person; army commander; led army against the Roman Republic *PARTA*U*
906. Comics; mercenary; More Fun Comics W*LL*AM GLENM*RGAN
909. Original; test subject *UBJE*T 0331 / ADAM
911. Original; double agent J. M*G*LL
913. Original; attorney GREG *URK  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURVWXZ123489]
914. Original; some sort of employer to the extent applicable ZAR*'* B***
916. Original; student if any TY**N
917. Comics (comics version's first name unknown); unrevealed; Green Arrow: Year One *AM HA*KETT
918. Original; soldier ADAM *REYKE  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
920. Earlier show (photos only); doctor/plastic surgeon/philanthropist/university professor/criminal; Gotham; pivotal figure in major villain's origin *ATERP*LLAR a.k.a. ETHAN *AMPBELL / AUGU*T *ARTWR*GHT
921. Original; unrevealed D*NA *ALVAT*
922. Original; slave *BR*H*M [LOCKED; all remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
923. Original; high school student/vigilante; son of a major hero J*RDAN KENT  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
924. Comics; mercenary; Green Lantern JA*KHAMMER  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
925. Possibly comics but a bit of a reach; police detective; Detective Comics if comics, Batman using surname B*LLY MAL*NE
927. Real person; soldier turned author; works have been turned into many movies J.R.R. T*LK*EN
928. Earlier show; criminal; Batman: The Animated Series; wife of major comics villain N*RA FR*E*
930. Original; district attorney D*AZ  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
935. Original; mercenary arsonist J*N **RTEZ
936. Original; barista/server NATAL*E  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
937. Original; vigilante/computer technician/custodian/car wash attendant *AV**R / J**EPH FALK
938. Original; waitress MAR**A
939. Comics; senator; Suicide Squad J**EPH *RAY
940. Original; drug lord H*DE* YAMANE
943. Comics; agency director; Action Comics; counterpart of cast character but gender swapped thus not the same actor BRA*N*A* # / QUERL D*X (EARTH-TUD1#)
944. Original; technology firm employee/crime syndicate member M*L**LM *TR*MB*RD
945. Comics; mercenary; Savage Hawkman; comics version is a legacy villain *HAD*W TH*EF / AV*VA METULA
950. Comics but gender swapped, so slightly different first name; doctor; Adventures of Superman AMEL*A HAM*LT*N
952. Comics but gender swapped (comics version real name unknown); thief; Hawkman NULL a.k.a. *UBJE*T 11 / JANET PETTY
953. Original; temporal agent REYE*  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
956. Original; unrevealed AMÉL*E  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLMNPQURTVWXYZ123489]
957. Original; family restaurant co-owner RU***
960. Comics; reporter; Action Comics; married to a different person than her Earth-Prime counterpart L*** LANE (EARTH-TUD22)
961. Comics; army intelligence officer/government commission member, interim police captain; The Flash Secret Files and Origins KR**TEN KRAMER
964. Mythology; prophet of sorts; Greek mythology ATR*P**
965. Shares surname (minus one letter) with comics character who fought the same hero but appearently actually named after two characters from non-DC show, making him essentially Original; crime leader V*N*ENT *TEELGRAVE
966. Comics; security agent/criminal gang member; Batwing RU**ELL TAVAR*FF
968. Comics; streamer/scientist/tech consultant; The Flash; comics version has a code name that is probably now non-PC *HE*TER P. RUNK
969. Comics (comics version's first name unknown); weapons dealer; Huntress B*BB* M*RETT*
970. Original; instituion worker (can't be more specific without revealing "name") ARKHAM A*YLUM NUR*E  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
971. Original; some sort of business head (can't be more specific without revealing "name") *E* *F **LVERM*NE HEALTH *N*URAN*E
973. Original; security agent BANK*  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
974. Earlier character this continuity; unrevealed if any AVA PR*ME  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
975. Original; student M*RGAN      [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
978. Original; cult leader *NH LY  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
979. Possible amalgmation of two comics characters; unrevealed; if comics, both from the same issue of The Flash FRAN**NE WE*T
980. Original; police captain/police detective K*MBERLY H*LL  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
981. Original; crime captain V*KT*R
982. Comics; blackjack dealer/bank robber; Infinity Inc. HAZARD / BE*KY *HARPE
984. Original; government agent/terrorist TAYL*R  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
985. Original; football player tight end turned criminal T*TAN / T*M TE*L*W
986. Original; engineer *ARL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
987. Original; unrevealed ADAM H*FFMAN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
988. Real person (indirectly); possible inventor/businessman if applicable TH*MA* ED***N (R*B*T)
990. Original; unrevealed JAKE DAVENP*RT  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
991. Original; unrevealed EMER**N FA*RWEATHER
992. Original in terms of names but power set apparently close to a comics character with different name; gender swapped if counterpart; blogger/junior reporter *PEN*ER **UNG
993. Comics; bartender; probably Hellblazer M*RY *NNE  [LOCKED; both remaining letters the same; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
995. Comics; terrorist; JLA *RMEK [LOCKED; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
996. Original; weapons supplier KLAU* MARK**
997. Original; unrevealed; mother of cast character KATHER*NE GRANT  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1001. Possible counterpart of comics character with different name; barkeep; possibly Constantine: The Hellblazer DE*M*ND
1002. Original; crime boss/shipping port facility owner JERRY BERT*NELL*  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
1003. Original; government divisiion director *H*P ***PER
1004. Original; police lieutenant *AM **NAHAN
1006. Original; unrevealed NA*M* WHEELER
1007. Original; assistant district attorney ANG** *TANT*N
1008. Original; unrevealed J*E B*ARDMAN  [LOCKED: Letters/numbers found so far: ABDEFGHJKLMNPQURTVWXYZ123489]
1013. Original; high school student DEN**E *L*WE
1014. Movie; priestess/judicator/council member; Supergirl *ELENA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1015. Original; CEO/businessman JAME* H*LDER
1016. Movie apparently; unrevealed; Superman II; played by an actor from a Star Trek series EARTH-38 D**M*DA* PR*TE*T*R
1018. Original; house staff RA**A
1019. Earlier character this continuity; temporal agent to the extent applicable E*PERANZA *RUZ (R*B*T)
1020. Original; unrevealed *M*ND* [LOCKED; all remaining letters the same; letters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
1026. Original; unrevealed GL*R*A *RUZ
1027. Gender swapped version of comics character despite other versions of the character who aren't gender swapped also existing; gangster/black market arms dealer; Showcase J*HN L*R*NG
1029. Comics; crime boss; probably Huntress P*N* BERT*NELL*
1030. Original; musician *AN  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1031. Original; used car salesman DE*N *WEN*
1032. Original; nation ruler T*R DEGAT*N  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1034. Comics; district attorney; Manhunter KATE *PEN*ER
1035. Comics; editor-in-chief; The Brave and the Bold; in name only version of comics character, who was a teenage mascot *NAPPER *ARR
1040. Original; university professor ALDU* B*ARDMAN
1041. Comics; scientist; Firestorm JA**N RU**H
1042. Comics; criminal; The Flash *L*VE Y*RK*N
1048. Original; unrevealed GRA*E G*BB*N*' FATHER
1049. Original; unrevealed MA**N
1050. Original; undercover agent/freelance IT specialist JENNY J*HN**N
1051. Real person; physicist MAR*E *UR*E
1053. Original; CEO JANET *ARR*LL
1054. Original but name refers to two real people; criminal *ARM*NE BR**ME
1055. Earlier character this continuity; unrevealed V*TA'* EARTH-TUD1# D*PPELGÄNGER)
1056. Original; art thief BA*T*AN *TRAYD
1057. Race from mythology; camp counselor; race from  Albanian mythology *HTR*GA / "*HAD *TEPHEN*"
1062. Comics (different code name); lawyer/serial killer; Green Arrow: The Longbow Hunters; comics version operated out of Seattle *TARL*NG *LA*HER / R**HARD
1069. Original; terrorist/technology firm employee MARG*T M*RR***N
1070. Earlier character this continuity; some sort of cook *HEF AVA  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1075. Comics (indirectly); criminal of sorts; Showcase; replaced another character for an extended period of time *R** WE*T-*LLEN (M*RR*RVER*E)
1076. Original; nightclub employee BE*KY  [LOCKED; letters/numbers found at time of locking: BDEFGHKLMNPQURTVWXYZ123489]
1077. Original; head of PR *HARL*E *LARKE
1080. Original; police detective M*KENNA HALL  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1081. Comics; police sergeant/criminal; Flash Comics; killed by antimatter D*NAH DRAKE (EARTH-2)  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1083. Comics; bank robber; The Flash *LYDE MARD*N
1084. Original; unrevealed REGG*E HARR**'* GRANDM*THER
1088. Original; Chief of Staff *ARAH WALKER  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1089. Origina; judge; JUDGE T*N*K*  [LOCKED; characters found at time of locking: BDEFGHKLMNPQURTVWXZ123489]
1091. Comics; unrevealed; Action Comics BRA*N*A* # (EARTH-TUD18)
1092. Original; scientist RAND *'RE*LLY
1093. Comics; princess; Captain Atom N**R HARJAVT*
1096. Comics; crime godfather; Outsiders **HMAEL GREG*R
1098. Comics; pet; Action Comics; no actual appearance, seen only in room constructed from main character's memories *TREAKY  [LOCKED; letters/numbers found at time of locking: ABDEFGHKLNPQURTVWXYZ123489]
1100. Original; scientist DR. DE*M*ND RAAB

 

Andy E. Nystrom wrote:

Thomas Edison requires a qualifier before I can accept the answer (the real Arrowverse Edison was in part 2). 
 

Thomas Edison robot

Updated the list to include the robot.
Remaining photos of real people with counterparts this collage (where photos exist):

786 Smith
787 Imani
788 Les-Lay

791 Purity / Julia Freeman
792 Mandrax

813 Vincent Santini
814 Everyman / Hannibal Bates

822 Javelin / Malcolm Byrd

831 Grim Reaper

854 Peter Declan
855 Atom-Man / Henry Miller
856 Amber

858 Echo / Cisco Ramon (Earth-19)
859 Thomas Flynn

862 Sophie Moore's mother
863 Nelson Ravich
864 Tom Patterson

866 Jared Swanstrom

877 Mirror Master/Sam Scudder

881 Dean Petrocelli
882 Jose Anton

889 Earl Cox

913 Greg Turk
914 Zari's boss

923 Jordan Kent
924 Jackhammer

937 Joseph Falk/Savior
938 Marisa
940 Hideo Yamane

943 Brainiac 5/Querl Dox  (Earth-TUD16)

956 Amelie

960 Lois Lane (Earth-TUD22)

971 CEO of Silvermine Health Insurance

973 Banks

981 Viktor

995 Armek
996 Klaus Markos

1003 Chip Cooper
1004 Sam Conahan

1026 Gloria Cruz
1027 John Loring
1029 Pino Bertinelli

1048 Grace Gibbon's father
1049 Mason
1051 Marie Curie

1080 McKenna Hall
1081 Dinah Drake (Earth-2)

Natalie I'll allow (936. not 836), The rest are correct; list updated. In the comics Kate Spencer is Manhunter while Streaky is Supercat. I don't think I need to explain the Simon Kirby reference. Tommy Moran is the music world version of Malcolm Merlyn. Caterpillar is the catalyst figure in Alice's origin.

Cast related clues now folded into previous post.

Locked characters:
781
785
799
800
803
807
868
893
894
895
918
970
984
990
993
1014
1030
1070


Partial guesses okay.

As before, this link is a good location if you're stuck: https://arrow.fandom.com/wiki/Category:Characters

Real people still in play (where photos exist):

 

A few answers got a bit garbled but close enough that I allowed them. Everyone now found. Part 4 will begin shortly.