W/O great recruiting the defensive head coaches programs go up and down.
1. Tressel, offensive coach with a great recruiting base in Ohio. He hires great DCs, but his offense is versatile and meshes to talent.
2. Carroll, used to DC is own defense, last two years has given it to Holt. Holt's defenses don't produce TOs. Offense has been run by Chow, Kiffin and now Sarkesian. They run the WC offense, but with a zone running scheme, so they are more like the Broncos than the 49ers of old. Face it, he has CA and the entirenation to draw from, and gets to 5 classes each year.
3. Stoops is a coach that has hired his brother, and Venables. Mike was a great DC, OU defenses under Venable and Pelini are no where near those that Mike had. Offense has evolved from spread to a more multiple offense with the power I and 3 TE sets. Despite losing Leach, Mangino, Long, he has managed to develop some top notch college QB, while Bomar was the only big time QB recruit. This guys has the state of Texas as his base and the nation.
I think these are the three best coaches there are. I'm a UT grad and a Mack Brown hater! He is to much like a politician, but he wins big, while he waters down his non-conference schedule and is a glass is half full guy. He is known for not developing talent and is the beneficiary of sitting in the goldmine of the big 12/Austin and the top recruiting state in the nation. Texas produces more D1 players than any other state! His defenses range from average to great, and the same for his offenses. He has never won any sort of title in 23 years, save for what he was "gifted" by VY! He is John Cooper and Phil Fulmer, a great recruter, but not a great coach. He is another offensive minded coach, and his offenses have usually been known for putting up points, but dying in the big games.