If you count it not being on the singles comp, the Olivia Tremor Control - I'm Not Feeling Human. And if you don't count it being on foreign versions of albums, the Apples in Stereo - Her Pretty Face. Signal in the Sky is awesome too!
Only human too, made me cry several times after the first time I heard it. I saw it on YouTube. Jeff Mangum sings and plays. ‘Meister Milk’ post a bunch of unreleased demos of Jeff and friends:)