Stew Mandel released his annual list over on the Athletic (paywalled, so I won't link).
His top five are Saban, Dabo, Petersen, Riley, Kelley.
B1G coaches: Dantonio (14), Franklin (15), Fitzgerald (17), Brohm (22), Frost (25). Note that he has a policy of not ranking guys with tiny sample sizes, so there's no Day now just like there wasn't a Riley last year. But hopefully he's high on this list next year.
I'd personally put Smart in the top five, and I think Brohm should be closer to 10, but other than that I guess I can't disagree too much.
Also notable? It appears that the shine has *finally* worn off of Harbaugh.