Looking at it objectively, this is how it would shake out in my mind
LSU - Beat 5 teams ranked in the Top 10 at the time they played. Worst 2 wins were over #9 and #3 by a total of 8 points. 4 of 6 teams in their division aside from them were .500 or better.
Ohio State - Beat 2 teams ranked in the Top 10 at the time they played and 2 more ranked 10-20 at the time of playing. Worst 2 wins were over #8 twice by a total of 24 points. 4 of 6 teams in their division aside from them were .500 or better.
Clemson - Played 0 teams ranked in the Top 10 at the time of playing and beat 1 ranked 10-20 (Common opponent with LSU but LSU gets no credit for them as they were unranked by the time they played). Worst 2 wins were over #12 and an unranked team by a total of 15 points (beat unranked NC by 1 who went on to be .500 for the year). 4 of 6 teams in their division aside from them were .500 or better.
That leaves no doubt in my mind that LSU and Ohio State carry the best eye test into this.