In the following order
Jim Harbaugh (white retread I know). But do you really think a Harbaugh coached team would have twelve men on the field for a game winning FG attempt? Harbaugh gets them to the SuperBowl year 1 or 2. He has won everywhere he goes. If he wears out his welcome in 3 years after a SB win, I don't care.
Lincoln Riley
Brian Johnson
if you want to go defense(keep Brady as OC), then go get Dan Lanning in Oregon. He led Georgia defense for three years and now is doing a great job at Oregon.