What, no songs written by Leonard Cohen?

"Bird on a Wire"
"Suzanne"
"Hey, That's No Way to Say Goodbye" would all be ones that I would think about, even if they didn't make the final cut.

Also Joni Mitchell's, "That Song About the Midway." She didn't really hit her stride until the early '70's, but there are certainly two or three from her early albums that would be in the running for my list.