If I had to rank them for winnability, from most likely to least likely, I would go:
OU
LSU
Bama
A&M
Ole Miss
Several of them are undefeated, but I would say unproven. OU's record looks good, beating Michigan and Auburn, but Michigan hasn't really played anyone and Auburn has lost to the two good teams they've face. Their QB might be out for our game, which gives us maybe a shot. LSU has looked unimpressive in all of their games so far, given their preseason hype. Their offense isn't a lot better than ours. I have Bama 3rd, just because that's at home. A&M is undefeated, but their biggest win was crushing a ND team whose two wins this year are against Arkansas and Purdue. But, on the road in College Station is daunting. Ole Miss' biggest win, of course, is LSU, but LSU hasn't been impressive.
Still an overwhelmingly daunting stretch, and we won't be favored in any game, but most of these teams' early schedules have been fairly vanilla.
I would say our best shot is figure out a way to pick off LSU at home, if that's even possible. Their OL is apparently not that good and Nussmeier hasn't been great (maybe playing injured). If we win that, then we come home with a head of steam to play a hopefully diminished OU without Mateer. Win that, then we get Bama in WB. We would be ranked and Bama will be coming off games against Mizzou and Tennessee, which could easily be losses for them. Maybe we catch them deflated? Don't see a snowball's chance of winning at Ole Miss.