If the question is "figurehead" then it has to be Paterno because that's all he is at his own school.
As far as the actual coaches, the B1G is lacking street cred now without Tressel that's for sure. Dantonio is solid but I get the feeling that's the best its ever going to get with him. Ferentz has the rep of doing more with less and the media on his jock. That moronic dick with ears in Wisconsin is absolutely worthless. I like Fitzgerald but he's stuck at Northwestern.
UNL, scUM and OSU all have the fairly to completely unproven package. Zook is Zook and the Indiana schools plus Minny, well can anyone really name their coaches without looking it up? Purdue is spack or spackle or some such [Mark May] I know that.
No I'm afraid the B1G is bringing a knife to a gun fight in a coaching smack contest right now. Could be a lot different in a few years.