I like both Fisher and Strong, and think either would be a good hire. Between those two Hart would have to assess which has the intangibles--leadership skills, fire to win in the SEC and get Tennessee back to the top; recruiting; and crucially which could put together the better staff. That last point cannot be underestimated--you are only as good as your staff (See Dooley and Sal--uggh). I have a feeling Fisher might have a slight advantage when it comes to staff but who knows.
RE Gundy: If you are Hart how do you avoid getting played by this guy and his agent and OSU, which surely will raise his pay--and he's already making a lot now. His osu teams score a ton but give up a lot of points. I want more defense--but you gotta have two great coordinators. Recall the two excellent defensive teams we've had in recent years--2007 and 2005 (I think) and our offense was HORRIBLE both years, reverse of this year.
Mora: Wild card, if he's interested. A lot of NFL experience, which I like. Has he been an NFL head coach? I think he's surely a damn good coach--and could probably put together a serious staff--but a west coast guy who has moved around a lot. Would he stick in Ktown for five years? Not if he's successful, I say. Would stay away.
Butch Davis: would be a solid hire, but would prefer Fisher and maybe Strong first.