I remembered the one I wanted to (Hal Ashby, who nobody probably cares about anyway, but I was curious), and added a few others:
Hal Ashby: B = Being There/Harold and Maude, W = The Last Detail was meh.
Elia Kazan: B = On the Waterfront, W = the message behind On the Waterfront
Sidney Lumet: B = 12 Angry Men, W = Before the Devil Knows You're Dead; Network (for spawning Glenn Beck).
Sydney Pollack: haven't seen enough of his stuff.
John Landis: OS = An American Werewolf In London and The Twilight Zone: The Movie