Coach Krzyzewski is--hands down--the best basketball coach in the country, and has been for years. I think Duke's recruiting has fallen off a little in recent years--partly if not mainly because K does want ballers who play for a year or two and then leave. His teams in recent years have not had the talent of UNC, Louisville or Kansas--but I think K almost always gets the most out of his talent. Look at this year's duke team--two skinny white kids are his second and third best players (after Henderson), one of the playing the point--and after that two or three very versatile, athletic role players.
That said, all of the star coaches--Pattino, Izzo, Calhoun (build UConn from the ground up, unlike Louisville or Kansas or UNC), Williams and a few others are outstanding coaches because they've been putting outstanding teams on the floor for many, many years--in different places, too. Wright at Villanova is an excellent coach--they remain my sleeper team in the tourney. Beilin at michigan is very good. There are numerous others.