In my opinion, Oklahoma hands down.
2000, 13-0 BCS National Champs, Conference Champs, Finished #1
2001, 11-2 Cotton Bowl Champs, Big 12 South Champs, Finsihed #6
2002, 12-2 Rose Bowl Champs, Conference Champs, Finsihed #5
2003, 12-2 Big 12 South Champs, Loss in Sugar Bowl, Jason White Heisman Winner, Finished #3
2004, 12-1 Big 12 Champs, Orange Bowl Championship loss, Finished #3
2005, 8-4, Finished #22
2006, 11-3, Big 12 Champs, Loss in Fiesta Bowl, Finished #11
2007, 11-3, Big 12 Champs, Loss in Fiesta Bowl, Finished #8
2008, 12-2, Big 12 Champs, Loss in BCS Championship Game, Sam Bradford Heisman winner, Finished #5
2009, 8-5, Finished unranked.
Oklahoma appeared in 8 BCS games in a 10 year span, winning 3 of them, 1 of them being BCS Championship. IMO, remarkable 10 years, especially with it beginning in Stoop's 2nd year.