Okay, in the overrated, but not worst category, my favorite whipping boy, Len Ceglarski.
Between the Scott Harlow-Bob Sweeney-Craig Janney-Kevin Stevens-Brian Leetch-Doug Brown etc. teams in the 80s to the Dave Emma-Steve Heinze-Marty McInnis-Bill Guerin-Ted Crowley teams in the early 90s, few coaches have had as much talent and accomplished less on the national stage than Ceglarski.
One just needs to compare him and Jerry York. Both had and have had tremendous talent, York has won three national titles with his and come close numerous other times. Ceglarski...not so much.
I didn't used to feel as strongly this way, but I suppose the York era has made me realize in retrospect just how disappointing the Ceglarski era was.