Another director I've been voracious with lately is Godard, though not for his unbeatable consistency during any era - rather how forward-forging and interesting he's always been. Goodbye to Language in 3D was ace if you like that sort of thing. I think everything came together best for him in Band of Outsiders; the attention to theory and style, the pathos and the energy.
Band of Outsiders is such a great movie. I love Godard but have always been more of a Melville man myself. Army of Shadows is one of my favorite movies.
Just watched Inherent Vices. I liked it a lot, but by far his least PT Anderson movie (if that makes any sense).