Classiest Radiohead ?

I am making a "mixed tape" of what I consider "classiest" and "high-brow art" stuff ever done musically. For example, I got Joni Mitchell's "Car on a Hill" included, a track from Pet Sounds, Debussy's Prelude to a Faun is on there. Bowie doing "Life on Mars" and Miles Davis "Well You Needn't" are some that have made The Cut.

What is Radiohead's most "classiest" and most Audrey Hepburn in Breakfast at Tiffany's type classy stuff? Something pure? It Transcends! Their most Beautiful song is....

Subterranean Homesick Alien is my answer.