Mine is De Palma, it's a pity, if you haven't seen any of his films, especially those filmed at early 90's.
He and Al Pacino is the best partner, true, I like his idea on crime movies with a wide scene of gansters.
When Sam Raimi made Evil Dead I,II, and Army Of Darkness he was the best B-movie director. Now he is high profile, but still a great director.
I'm not sure how one comes to the conclusion that Brian DePalma is a B-movie director with his multiple hit films (Carlito's Way, Scarface, Untouchables, etc).
Sam Rami is a good choice, but not anymore. Same with Steven Soderburg who made a couple of great films (Sex, Lies, & Videotape, and the Limey) before he hit it big with Traffic, Erin Brockavich, and Ocean's 11/12/13.