Jonas Akerlund - without a doubt. One of the most controversial directors: My favourite Game - The Cardigans, Prodigy - smack My Bitch Up, Metallica - Whiskey In the Jar. All this videos were placed under censorship.
On the other hand his works: Moby - Porcelain, U2 - Beautiful Day, Madonna - Ray Of light - very beautiful works.
Akerlund - the best!!!!!!!
Spike Jonze - also very good. I really enjoy his works for Fatboy Slim!!!!!!!!!
David Fincher. Made a very small quantity of videos, but all of them are very professional and stylish (especially Freedom'90 by George Michael). Fincher is also one of my favourite movie directors - Fight Club forever!!!!!