You will hate a couple of these - Saban, Meyer, and David Shaw from the college ranks. I love David Shaw and think Meyer and Saban would be great for 3/4 seasons. From the pros - I like Pettine, McDaniels, Bieniemy,, Allen or Greg Roman. I am not wedded to an offensive guy taking over because I think you can convince whoever comes in to keep Moore.
I prefer a guy from a winning program. I think Petitine and Allen could be good if given a second chance.
The one guy I would want is Josh McDaniels. Sorry I know that is controversial. I just think he is an elite OC and has learned from the GOAT.