They should go after this bloke, Bill Bedenbaugh from Oklahoma.
The Oklahoma Sooners offense is insanely good. They scored 80 TD's (almost 10 better than second place) and average 8.29 yards per play (almost 1 whole yard better than the next team) and 11.70 yards per pass attempt (again almost 1 yard better than the next team).
He's the co-OC AND O-line coach.
In 2016, their offensive line overcame early season shuffling due to injuries to help Sooners to one of most productive offensive years in school history, ranking first nationally in passing efficiency rating (mark of 193.79 set an FBS record) and pass completion percentage (.706), second in total offense (554.8 ypg) and third in scoring offense (43.9 ppg). OU also led the Big 12 by allowing just 1.6 sacks per game.
And OU registered its top two rushing seasons since Bedenbaugh joined the staff. The Sooners led the Big 12 and ranked 10th in the nation in 2014, averaging 261.2 rushing ypg. The schools who outrank them are those that just don't throw it and run every time.