Seeing your list gives me some authors I probably need to look into, Felix.

My list...
Haruki Murakami
Koji Suzuki
Carl Sagan
Douglas Adams
Tom Robbins
Chuck Palahniuk
David Sedaris
Robert Anton Wilson
1/2 of Stephen King
Brian Greene (as long as he's not on about string theory)
Bertrand Russell
Kurt Vonnegut
Can I count Hugh Laurie, since he's only written one novel so far? It was really good, if that counts.
If we're including graphic works...
Alan Moore
Grant Morrison
Warren Ellis
Tsugumi Ohba
Rumiko Takahashi
Saki Hiwatari
CLAMP
That's all, off the top of my head. I'm probably forgetting some and I specifically excluded someone because he specifically doesn't mention authors who are important to his work.