I think I’m able to see with clarity now my main problem with this list: Rolling Stone puts far too much emphasis on importance.
“Fortunate Son” is a fine song, but there are about a half dozen or more CCR songs that are better: better written, better performed. But “Fortunate Son” is more important given the significance of its lyrics at the time it was written. And this is the same with so many other songs on this list- notably Billie Holiday’s “Strange Fruit” - great song but in what universe is it better than “God Bless the Child”, or for that matter a whole host of Cole Porter, Irving Berlin, and George Gershwin masterpieces that you have to consider if you’re going to allow “Strange Fruit” in anyhow?
Social or historical importance should not, IMO, be an element of greatness. Nor should influence. I think you should be able to listen to a song without knowing a single thing about its history and evaluate its greatness based on the elements of the song: structure, melody, lyrics, production, etc.