Tim Burton.
He's been my fave' since 1989, probably always will be.
Barring Planet of the Apes, I can't think of a single dud film he's made.
Batman, Nightmare Before Chrismas, Beetlejuice, Sleepy Hollow, Ed Wood, Mars Attacks, Charlie&CTF, all fantastic.
Peter Jackson is probably second, not just for LOTR, I was a huge fan of Beautiful Creatures long before I knew LOTR was being made, I also love King Kong.
An honourable mention must go to Alfonso Cuaron for dragging the Harry Potter series out of a ditch.