I know the usual poll caveats apply, but this seems a glaring omission given the rest of the options:

The Rocky Horror Picture Show soundtrack (glam/musical?).

A quick glance at my fave playlist brings up (unordered, uncategorised):

Godspeed You Black Emporer
Do Make Say Think
Modest Mouse
Neutral Milk Hotel
The Dresden Dolls
The Cat Empire
Ween
Psychic TV
Captain Beefheart
Innocence Mission
King Crimson
Barry Adamson
Richard Cheese
The White Stripes
Recoil