Lupe Fiasco, Kanye West, and Pharrell - "Us Placers"
OK, not exactly obscure. Also, technically this isn’t even a Thom Yorke song. However, some people may not realize that the beat and chorus vocals are taken from Yorke’s “The Eraser,” plus every single verse on this song is a classic, so you need to hear it. Kanye released “Us Placers” to hype up the album that he was working on with Pharrell and Lupe tentatively titled Child Rebel Soldier, but it never came into fruition.
To this day, we're left wondering “what if?” *Sigh*