I know folks think the committee gives the SEC some kind of sainthood here, but IF somehow UGA was 12-1, it would likely be a fairly unimpressive 12-1, no good OOC wins at all, and only wins over Florida, UK, and Bama in conference of any consequence, and UK of course could fade.
I don't think they would be better than fourth, depending. LSU on the other hand has one nice OOC win and would have significant in conference wins, so they would be higher.
A 12-1 Clemson would also not have a whole lot of track record, although the win over A&M on the road is pretty decent. Ohio State would have (does have) TWO wins OOC over P5 teams even if one of those is not good. That would be impressive along with a B1G trophy.