My short list:
1. Here's a name that hasn't been mentioned yet: Mike MacIntyre, could we pry him away from Colorado? Currently makes 2.2 million, would he leave for 3.5 - 4 million? Turned around both San Jose St. and Colorado, defensive minded, NFL experience, great recruiter, former DB so we could still excel there. A lateral move but B10 has more prestige, I at least call and gauge interest.
2. PJ Fleck, anyone who can turn Western Michigan into a Top 20 team in the same amount of time Kill and Claeys had here and couldn't would be OK.
3. Sumlin, would be a great hire.