Living in Texas, I have a bit of a different take on Riley than many on the West Coast.
Riley won a ton of games at Oklahoma at the perfect time (Texas, K-State and Tech were diminished during Riley's tenure), but was somewhat similar to Cristobal.
Riley recruited top flight talent and yet barely won games against mediocre talent. Friends of mine who went to Oklahoma felt the program was slipping, despite the impressive win totals.
Pull up Oklahoma's schedule over the past three years and look at the number of very close games against teams with mediocre or just above average recruiting classes.
This is no Pete Carroll-not even close.
He did not dominate the Conference the way Bob Stoops did, just beating the daylights out of everyone. Rather, he took the best talent in the Conference and frankly seemed to just get by against teams that were not even close to Oklahoma in talent.