These are some of the potential HC guys I like if this does happen (which I think is very low):

Mike Zimmer
Bill O'Brien
Todd Bowles
Ray Horton
Rich Bissacia (token ST coach)
Mayyybbeeee Adam Gase, not too sure.

My preference is an offensive genius, but there are no Chip Kellys/Trestmans/McCoys available this year I don't think