I know a lot of authors are grumbling that Bob Dylan won the Nobel Prize for literature, but please. If this man's lyrics weren't among the most important words of his era, then I'm a lumberjack. (PS--I do own one flannel shirt, but I have baby soft hands).
The New York Times has a great piece about Dylan and why he so richly deserved this honor.
His songs from the 1960s will always be a great representation of that time. This probably isn't one of his more popular songs (it's from his gospel era), but it's always spoken to me. I like this version of "Gotta Serve Somebody"