Give me Lon Kruger.
I dont think there is much of a chance that OU can pry him from UNLV, but they are in a pretty big financial crisis and are cutting the athletic budget.
He wouldn't be a coach that you get 15 years out of...but he could come in and solidify the program for 5-7 years, gets us back in contention, and either develop a good assistant to take over for him or at least make OU an attractive enough choice for a B+ tier coach when he retires.
I think he is a pipe dream, but would be better for the program than any of the coaches mentioned.