Beatles.
I'm surprised disappointed at the ramped hatred for Beatles here. They have some great albums, and great songs that aren't usually heard on the radio. I'd suggest actually hearing an entire album by the band before casually dismissing them, if you haven't already. Don't go into it expecting Slayer or 2LiveCrew, and you should be able to appreciate at least some of the breadth of their work.
Much of the pop music you all listen to today was already written by the Beatles, so you like them whether you realize it or not
I'm not a huge Stones fan, but I can respect their contribution to music. And I see its only fitting we are talking 'bout horses, ponies, etc, since McJagger looks like a fuggin' donkey.