This was kind of tough, but my Top Ten, in no particular order, would be:
Ween
Butthole Surfers
Iron & Wine (although this may just be an "At the moment" entry, not one of his albums have left my CD player since I first picked up "The Creek Drank the Cradle")
the Flaming Lips
Beck
Pavement
the Pixies
Belle & Sebastian
the Clash
the Jesus Lizard