Entering November, it looks like there's around 22 teams from the power conferences plus Notre Dame that are realistically in the hunt for 11 playoff spots.
ACC-Miami, Clemson, Pittsburgh, SMU
Big 12-Iowa St., BYU, Kansas St., Colorado
Big 10- Oregon, Penn St. Ohio St., Indiana, Illinois
SEC-Georgia, Texas A&M, Tennessee, Texas, Alabama, LSU, Mississippi, Missouri
Independent-Notre Dame
Among the other 5 conferences, it looks as though there are probably 6 teams that could factor in as a conference champion for the last spot.
American-Army, Navy, Memphis, Tulare
Mountain West-Boise St., UNLV