Manny Diaz would be a great hire.
With Ted Roof, I'm not so sure. I still remember one game where they showed the coaches on the sidelines and, reading lips, Coach Roof asked Coach Chizik, "should I call that play" (not sure what play it was) and Chizik responded back with, "yeah it's your job, do your damn job." The resulting play gave up about 35 yards on 3rd and 12.