Hughes (who doesn't love Ferris Bueller?),
Polanski,
Hitchcock,
Coen Bros.,
(Kevin) Smith,
(Wes) Anderson...
Scorcese - of course! Gangs of New York blew the Aviator out of the water. (and my cousin has been co-producer on many of his films;))
I did like Ang Lee's work on Brokeback.
And I dug the direction of Good Night, Good Luck...however, I might have more an affection for the lighting director for that movie.