Hmm, INTP... that seems a little unlikely. I was personally considering him to be an INTJ. His songs seem a little too fluid and nonrigid to be the creation of dom-Ti. But their revolutionary, out-there and highly individualised style with flecks of prophetic insights are obvious signs of dominant Ni. Not to mention his brooding, calculative nature, seemingly placing strategic emphasis and planning onto his every action, clearing placing Te as auxiliary.
Well, I can't be bothered to go into detail, but I've read some stuff about them, and it seems an accurate typing. Obviously their image will distort peoples perceptions though. Interviews show what they're really like; clearly introverted and with lower-F (which seems to be Fe). ISTP and/or one of them being a TJ might be likely also.