I mean, if the off-the-court problems (some of his own making, some a conspiracy) didn't exist, Sutton would be the obvious #3 here (judging pure coaching acumen).
But with all the results considered, the list makes sense.
Id switch Sutton and Billy G. Noone was more an embarrassment to the program than he was. I was young during the Sutton days and not privy to all of his indiscretions but Billy G showed his ass repeatedly on national TV for the world to see.