If we're talking Pablo Honey, then You deserves a mention.. great early Radiohead track. Plus this version at Reading festival is super, that scream at 1:50 is Yorke at the peak of his falsetto powers.
https://www.youtube.com/watch?v=8vbZ73q4oewIn complete agreement with Blow Out and Lurgee, great tracks. I draw the line at Stop Whispering though, absolute garbage
Also Amnesiac is a hugely underrated album by them, everyone always harps on about Kid A, and quite rightly, it's incredible, but Amnesiac is something else. I love the Mingus style Jazz influence, that kinda solemn and sombre trudge it has on a few tracks. I think it's Radiohead at their most challenging, but also most rewarding.
Edit: I guess when I say challenging, it isn't really in the grand scheme of contemporary music, but for most of their original fan base it must be quite a digression.
Sagan: In order to make an apple pie from scratch, you must first invent the universe.
Basinski: I wanted Cascade to become this crystalline organism like a star or a liquid crystal spaceship, a jellyfish traveling through the galaxy…