Voted Harbaugh / Other.
Jim is a good football coach, regardless of everything else that surrounds him. I also think that even though he's a long-shot, there is at least a slim hope that we can pull it off and bring him here. We'd have to give up a lot, but he's a proven coach.
My 'other' choice would be to roll the dice on a prodigy with limited NFL experience and hope he pans out. I'm thinking specifically of Gus Malzahn. I know that some people will point to Saban as a reason to avoid going to the college ranks, but the truth is that Saban was a good coach who simply screwed up some personnel decisions, especially the QB. I don't think that necessarily means we should never hire a college coach again. I point to the success of Chip Kelly -- someone I thought was going to crash and burn in the NFL -- as an example of how innovative and talented college coaches can bring something new to the NFL.
Dark horse: Gary Kubiak.