We will have played 5 games against ranked teams when all is said and done. So far it was Bama (W), Kansas (W), OU (L), K-State (W), and likely upcoming OSU.
Georgia will probably have 5, tOSU 3 or 4, Michigan will only have 3, FSU 3, Louisville 3, Washington 5, Oregon 5, Bama 5, Penn State 3 or 4, and Ole Miss 4.
This includes CCGs. I think with our SOC and SOR as long as we win out we should be golden. PSU, Louisville, and Ole Miss I don't think are in it. Washington has 2 ranked games coming up and Oregon has 1, plus both will probably play each other again. FSU has Miami and Florida (and FCS North Alabama) and a CCG. Oregon State will actually play 5 ranked teams as well but they still play Washington and Oregon. Barring a miracle they are out.
My guess (in no particular order) is tOSU, UGA, Washington or FSU, Texas. I don't see 4 undefeated teams left, and maybe not 3. Probably just tOSU and UGA.