Ohio State is a given for the NC game. They played Illinois, Wisconsin, Penn State and Michigan. Kansas played Missouri and Texas A&M. So, for a 1-loss team, OSU is in.
Hawaii is undefeated, but the toughest team they played out of conference was Washington. Not a bad team, but their other OOC games were very weak. Boost the schedule if you want to play for an NC. (Actually I feel the same about Ohio State, but at least they played in a decent conference).
So it really comes down to LSU and Kansas (Georgia falls behind LSU in any comparison). And I have to give LSU the nod. Their two losses were OT games. Not bad.
So OSU and LSU in the NC game.