LOL at anyone who doesn't have K as #1. Dude is the G.O.A.T.
the rest in no order but first group is better than second group.
Ol' Roy
Izzo
Pitino
Boehiem
Huggs
Motta
Donovan
Howland
Self
This is a hard one to give a good answer to because being the most accomplished is not the same as being the best for say the next 5 or so years going forward.
Still it begins and ends with K.