Patke does LBs. Rumph does CBs, but imo it doesnt make sense to have 2 DB coaches. If the next DC is a DB guy, then he and Rumph can tackle that together, hopefully freeing up a coach for the O side of the ball.
No particular order here... just some names that'd probably do well. My choice would be Grinch or Chizick because of the positive buzz.
Greg Schiano
Alex Grinch
Gene Chizick
Matt House
Bob Shoop