in some cases these directors are also the authors of the films...

Peter Weir when he was still working in Australia; his Hollywood efforts have not all been good (except maybe Witness).

Jane Campion (tho I am tired of Harvey Keitel's naked ass)

Federico Fellini.

Ingmar Bergman.

Albicocco for "The Wanderer"

I do like the Coen Brothers for the most part.

Alan Parker.

Danny Boyle.

Terry Gilliam.

Todd Haynes.

Rose Troche.

John Boorman.

Ken Loach.

Woody Allen until about 6 or 7 years ago...

Michael Haneke.

Frederic Thor Fredericsson.

Hal Hartley.