Joe Philbin was the other name thrown around IIRC, but he's old and I don't think he's called plays since the 90s. What they should do is try to convince a young Rams or 49ers assistant to take the job - their scheme is in that ballpark, if they had someone who had an ounce of creativity and playcalling acumen they could be average pretty quickly.
Bigger problem is recruiting, which is why I think they dodged a bullet with Chryst turning them down. He's be great for the Xs and Os, but they need to get some skill talent and he could not care less about recruiting. If they hire someone young with new ideas, I don't think it's a tough sell to bring in respectable backs and receivers. It's a Big Ten school with no competition for touches. But I don't think Ferentz will hire young, and the old creative guys are experienced enough to see they will be boxed in and probably be overruled by Kirk on guys they want to offer.