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Cleaned up clues:
1099: Original TV show character; 10s; Owner of some sort of music company
1112: Original TV show character; 90s; government agent
1115: Original TV show character; 20s; police officer
1117: From a commercial; based on comics; 80s; Action Comics; seen in commercial for breakfast item
1126: Original TV show character; 10s; salvage worker
1138: From a TV show; based on comics; 00s; Superman's Pal Jimmy Olsen; leader of criminal organization
1154: Original TV show character; 90s; secretary
1158: From a TV show; based on earlier character same continuity; 90s; scientist
1159: From a TV show; based on comics (comics version has different real suname); 20s; Steel, the Indestructible Man; high ranking in the miliytsary
1163: Original TV show character; 90s; first name is something in outer space
1165: Original TV show character; 80s; briely dated main character
1167: From a TV show; based on comics; 00s; Batman; assassin
1168: From a TV show; based on comics; 00s; The Brave and the Bold; leader of government team
1169: Original TV show character; 10s; model
1170: From a commercial; based on comics; 00s; All-Star Comis; spins to transform
1172: Original TV show character; 10s; junkyard owner
1177: Original movie serial character; 50s; major villain
1181: Original TV show character; 20s; main character hid inside his and spouse's apartment
1183: From a commercial; based on comics; 10s; Detective Comics; has henchwoman
1185: From a movie; dressed as someone based on comics; 00s; All-Star Comics; real life documentary subject
1190: From a TV show; based on comics; 10s; Doom Patrol; activist
1195: Original TV show character; 20s; wife of villain
1196: Original TV show character; 00s; scientist
1197: Original TV show character; 50s; appeared in an episode about an animal being stolen
1198: From a TV show; based on comics; 20s; Sandman; some sort of fanboy
1205: From a TV show; based on real person; 20s; writer
1213: Original short character; 50s; principal
1222: Original TV show character; 10s; mother of major villain
1224: Original movie character; 10s; robber
1225: From a commercial; based on comics; 90s; Brave and the Bold probably closest match for this version; a comic-based foe of his is mentioned but not seen
1227: Original TV show character; 00s; owned by major character
1232: From a TV show; based on comics; 90s; Action Comics; non-speaking role (a bit surprising in this context)
1235: From a TV show; possibly based on comics; 70s; Sensation Comics
1240: From a TV show; possibly inspired by comics character with different name; 10s; Brave and the Bold
1243: From a TV show; based on comics; 80s; All-Star Comics
1244: Original TV show character; 00s
1245: Original movie character; 20s
1246: From a movie; based on comics (probably loosely); 70s; Batman
1247: Original movie character; 80s
1250: Original TV show character; 20s
1251: From a TV show; based on comics; 10s; Detective Comics
1252: Original TV show character; 10s
1254: From a movie; based on comics (slightly different name); 70s; All-Star Comics
1260: Original movie serial character; 40s
1267: Original TV show character; 20s
1271: Original TV movie character; 90s
1273: Original TV show character; 80s
1274: From a TV show; based on comics; 10s; Fury of Firestorm
1275: From a TV show; based on comics; 20s; Wonder Woman
1280: Original movie serial character; 40s
1282: From a TV show; based on comics; 10s; Batman
1284: From a TV show; based on comics; 10s; Year One: Batman/Scarecrow
1285: Original TV show character; 10s
1286: From a movie; based on real person; 00s
1293: Original TV show character; 00s
1294: Original TV show character; 10s
1298: Original TV show character; 80s
1301: Original TV show character; 10s
1302: Original movie character; 80s
1311: Original TV show character; 00s
1314: From a TV show; based on real person; 20s
1315: Original TV show character; 10s
1320: Original movie serial character; 40s
1321: Original TV show character; 10s
1322: From a TV show; based on comics (slightly different surname); 70s; Action Comics
1323: From a movie; probably based on novel; 10s; Batman: The Ultimate Evil
1325: From a movie; based on comics; 10s; Batman
1328: Original TV show character; 90s
1331: From a movie; based on comics; 10s; Batman
1335: Original TV show character; 00s
1337: Original TV show character; 10s
1339: From a movie; based on comics; 20s; Batman
1340: From a TV show; based on comics (slightly different first name); 90s; Superman's Girl Friend, Lois Lane
1342: Original TV show character but probably named after song; 10s; song is name of character
1344: From a TV movie; based on comics; 00s; Detective Comics
1347: Original TV show character; 00s
1349: From a commercial; based on comics; 00s?; Action Comics
1353: Original movie character; 10s
1355: Original TV pilot character; 00s
1357: From a TV show; based on comics (comics vesion's suname unrevealed); 20s; Sandman
1358: Original movie character; 90s
1362: From a TV pilot; based on comics; 00s; Adventure Comics
1363: Original movie serial character; 40s
1365: From a commercial; based on comics; 10s?; Detective Comics
1368: From a TV show; based on comics; 20s; House of Secrets
1369: Original movie character; 00s
1371: From a TV show; based on comics; 10s; Super Friends
1372: Original TV show character; 10s
1373: From a TV show; possibly based on comics (TV version's first name unrevealed); 10s; Detective Comics
1375: Original TV show character; 10s
1377: Original TV show character; 00s
1380: From a TV show; based on comics; 00s; Batman
1382: Original TV show character; 80s
1383: Original TV show character; 10s
1385: From a commercial; based on comics; 70s; Action Comics
1388: Original TV show character; 10s
1389: From a TV show; based on earlier character same continuity; 90s
1390: From a TV show; based on earlier character same continuity; 10s
1391: From a TV show; based on comics; 20s
1392: From a TV show; based on earlier show; 20s; Arrow
1393: Original TV show character; 10s
1394: From a TV show; dressed as someone based on comics; 80s; Action Comics
1395: Original TV show character; 70s
1396: From a TV show; based on comics; 80s; Detective Comics
1398: From a commercial; based on comics; 10s; Detective Comics
1399: From a movie; based on comics; 60s; Detective Comics
1400: From a TV show; based on comics; 90s; Batman
1401: Original TV show character; 70s
1402: From a TV show; dressed as someone based on comics; 20s; Detective Comics
1403: From a commercial; based on comics; 10s; Batman
1405: From a TV show; based on comics; 20s; Superman's Pal, Jimmy Olsen
1407: From a commercial; based on comics; 00s; Action Comics
1408: From a commercial; based on comics; 10s; All-Star Comics
1409: From a TV show; based on comics; 00s?; Detective Comics
1410: From a TV show; based on comics; 90s; Detective Comics
1411: From a commercial; based on comics; 70s; Action Comics
1412: From a music video; based on comics; 90s; All-Star Comics
1413: From a music video; based on comics; 90s; Action Comics
1414: From a movie; based on real person; 70s
1418: Original movie character; 70s
1419: Original TV show character; 20s
1421: From probably multiple shows simultaneously; dressed as someone based on comics; 20s; Action Comics
1422: From a TV show; based on comics; 00s; Superman's Pal, Jimmy Olsen
1423: From a TV show; based on comics; 10s; Superman
1424: Original TV show character; 50s
1426: From a TV show; based on comics; 10s; Watchmen
1427: Original TV show character; 10s
1428: Original TV show character; 60s
1429: Original TV show character; 80s
1431: From a TV show; based on comics; 00s; Mister Miracle
1432: From a TV show; based on comics; 00s; Action Comics
1433: From a TV show; dressed as someone based on comics; 20s; Detective Comics
1434: Original TV show character; 60s
1435: Original TV show character; 20s
1436: From a commercial; claimed to be someone based on comics; 90s; Detective Comics
1437: From a commercial; based on real person; 90s
1438: From a TV show; based on real person; 90s
1439: From a TV show; based on comics; 00s; Forever People
1440: From a TV show; based on comics; 00s; Action Comics
1442: Original TV show character; 60s
1444: Original TV show character; 90s
1445: From a TV show; based on comics; 20s; All-Star Squadron
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1138, 1198 and 1286 already identified.
1284 Gerald Crane, Gotham
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1323 Debra Kane, Joker
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1357 Marsh Janowski, Sandman
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1355 Nadia, Aquaman pilot
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1368 Bruce Gordon, Stargirl
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1429 Matt Ritter, Superboy
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1158 Dr Winger (Superboy's Earth), Superboy
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1414 Rex Reed, Superman the Movie
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1431 Granny Goodness, Smallville
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1432 Zatara, Smallville
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1439 Glorious Godfrey, Smallville
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1437 Jerry Seinfeld, American Express Superman advert
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1438 John Dillinger, Lois and Clark
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1442 Queenie, Batman TV
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1419 Tim Tattle, Stargirl
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1154 Penny Barnes, Lois and Clark
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1185 Jennifer Wenger as Wonder Woman, Confessions of a Superhero
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1235 Magda, Wonder Woman TV
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1225 Hawkman, Baby Ruth commercial
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1340 Ellen Lane, Lois and Clark
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1158 is close enough (Superman's Earth, to disinguish from Superboy's own Earth). The rest are correct; list updated.
Being animated, Superman from American Express is a possibility for an animated update, or a mixed live/animated update. Wonder Woman/Jennifer Wenger is who I was thinking of when I mentioned at least one character was in multiple media as she's also been WW on Jimmy Kimmel Live. Most of Ellen Lane's counterparts are named Ella.
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1112 Dan Scardino, Lois and Clark
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1115 Peggy Sacks, Peacemaker
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1181 Evan Calcaterra, Peacemaker
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1267 has already been identified
1275 Myrrha, Titans
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1339 Martha Wayne, The Batman
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1932 John Diggle, Superman and Lois
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1405 Lucy Lane, Superman and Lois
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1213 Principal Garwood, Stamp Day for Superman