Jim Leonard is the best suggestion I've heard but I seriously doubt he would take it. He would need some major stroking and assurances from Pat Ryan and I am not sure Ryan is in any mood to remedy the situation.
For this season I doubt you get a sitting HC to move, even from the MAC. Just too late in the game. Have to find guys currently out of a full time job or maybe a coordinator.
Jim Leonard would be the dream hire, but probably wouldn’t touch the situation with a 10-foot pole, IMO. I think he’s waiting out an NFL DC gig.
David Shaw could work, but left his own alma mater basically because of burnout.
Paul Chryst is the most ideal plausible candidate i can think of. Chryst could see it as his way back into a B1G HC gig, even if just temporary. Wouldn’t have as many issues as he’s an analyst at Texas.
Sean Lewis is another guy I’ve liked for a while and would make sense — local guy, HC experience, knows how to run an offense, and moving from OC to HC would be easier contractually. But I can’t see him doing it unless he thinks it’s his only shot at a B1G HC gig.
Tough to quantify just how toxic the NU job is right now.