If I had to choose anybody to coach a single game with my life on the line Harbaugh would be my top choice.
But there are rumblings that Jon Gruden wants to get back into coaching, and you can even hear it in his commentary, he's really doing his homework scouting teams tendencies. He's like 'I know this guy, he likes to run this in this situation.' And sure enough that is what they do. And listening to him on hard knocks talking to the QBs, I almost got up and ran through a wall for him. I don't know if he would be great anymore, but he would be entertaining at least.