The Dismemberment Plan is mildly good, if achingly reminiscent of being in college early in this millennium (I like "You Are Invited"). The Portishead is passable, The Mothers Of Invention is annoying.
I've always meant to listen to that This Heat album, maybe I'll play it tomorrow. The Elliot Smith and Curtis Mayfield are probably pretty good. None of the Aphex Twin I've heard has been particularly enjoyable.
No idea on Boris, Glenn Branca, or Sun Kil Moon.