Mack Brown. Highest Winning % ever at Texas in the previous 80 years and 11 coaches, and that includes DKR.
Mack beat the two coaches that proceeded him by 20 percentage points.
Why do idiots think any-old-buddy can walk into a program like Texas and win?
Mack almost single-handily turned Texas Football into the financial super power that it is today. With the full understanding that money discussion as it relates to time period is relative. But before Mack got there, Texas athletics, while well heeled, wasn't some athletic financial super power. Yes they had a sizable budget, but it was like $18-20 million a year in 1994, and they just barely broke even. Mack Brown catapulted them into highest gross revenue producing athletic department in the country to the tune of $160 million plus a year. No AD needs ED medicine/hormonal augmentation if his/her wife/husband whispers those kind of sweet nothings into their ear.