New York mag ranks all 373 Rolling Stones songs (including covers recorded by the band as well as original compositions). Of course the list is backward, to keep you on the site longer, but at the bottom you'll find:

1. "You Can't Always Get What You Want," Let It Bleed
2. "Gimme Shelter," Let It Bleed
3. "Beast of Burden," Some Girls
4. "Jumpin' Jack Flash," Through the Past, Darkly (Big Hits Vol. 2)
5. "Sympathy for the Devil," Beggars Banquet

Howard Wolfson, who spotted the link, says "Gimmee Shelter is his #1: "I'm not sure how you really distinguish song 145 from song 217, but there isn't a ton to argue with in their top 50."