These are my top 5 songs by them (off the top of my head): Bloodbuzz Ohio, Slow Show, Green Gloves, I Should Live in Salt, Gospel.
Boxer is my favourite album by them, hence the large number of songs from that album. Light Years is a beautiful song from their most recent album.
They are an acquired taste and I have to be in a certain frame of mind to listen them. I really connect with so many of the songs, that's what I love about them.