I don't think any of them get fired this year, but if one does, it's probably Chump.
Pruitt, Taggart, and Kelly are all in their second year. Besides the buyouts being too much to handle for the schools, they all know that they won't get a decent coach to come in there after firing a coach just 2 years in.
Harbaugh, Michigan's chosen son, is doing a good job in recruiting, just not in getting them coached up. He'll get to reshuffle his coaching staff before he gets fired, buying him at least another season.
Muschamp won 22 games in his first 3 seasons at SCar, which is the most of any coach they've had. They have the nation's toughest schedule this year, as some coworker fans tell me repeatedly, and a freshman QB. He'll get another year as well unless he loses to everyone else on the schedule except Appalachian St (and never underestimate his ability to lose to a team like Appalachian St., either). On the other hand, Athletic Director Ray Tanner knows that a failing Muschamp might cost him his job as well, so he might fire Muschamp to try to save his own job. Then again, acting quickly isn't something associated with Tanner.