If we're being homerish, how about 1946?
UGA finishes 11-0. the only undefeated team after the bowls in major CFB, and finished third in the AP behind two teams with a tie each.
or 1966, 2 time defending national champ bama starts preseason #1, goes 11-0, end #3 behind nd and msu, who tied each other and didn't go bowling. only time a preseason #1 went undefeated, won bowl and didn't win title. also would have been first and only 3-peat.
another fun fact, with the ruling last week of nd vacating 21 wins, nd now will be able to break 900 wins for the second time. that's unique.
speaking of 900, texas (2 wins), alabama (9 wins), ohio state (2 wins), nebraska (7 wins), oklahoma (16 wins) and as mentioned nd (14 wins) all have a chance to break 900 next season.
also speaking of wins and win%, not counting vacations and forfeitures, but actual game results, bama is now 2nd in total wins (920) and 2nd in win% (mich leads both). and if bama finished just 1 game better than mich next season (11-1 vs 10-2, etc.) then bama will take over #1 in win% (actual results, not ncaa official).
i know, 'but you cheated, so count the official results', blah blah. as big of a problem as we had in the albert means case (the so called almost death penalty case), they didn't remove any wins. we lost wins because of a db drunkenly "signed with an agent" on a napkin the night after winning the 1992 title vs miami, and then again in mid 2000's for 4-5 kids sharing/buying girlfriends textbooks. both ridiculous, imo, similar to osu tattoo thing.
bobs or anyone else, correct those #s if wrong. most was based on memory and quick official record book search.