Merzbow will always be my favorite noise artist, mostly because he adds so much variety to his work. Sure, it's noise, but there's also his weird ass tributes to psychedellia, prog rock, kraut rock, metal, and free jazz. Plus, he's released an insane amount of stuff.
Also, try some rhythmic noise stuff on labels like Ant Zen, or artists like PAL or Xebox.
Oh, and Aube. Guy does noise, but also does some great ambient stuff, all with found sounds and various sources (fire, water, glass, etc.)
Then there is Cock ESP. They broke up, which is a shame, because they put on a hell of a live show. And by a hell of a live show, I mean two guys beating the everloving shit out of each other.