I assume you're trolling.
Coach K has been the best I'd say.
Calipari gets a lot of credit, but it's also obvious he gets the best talent, by far.. so not really fair.
Roy Williams has been one of the very worst... but the worst BY FAR has been Rick Barnes (and save me the Durant argument).
Coach K hasn't developed an All Star wing though has he, last time I checked?
Coach Crean has DWade.