Best rock song of all times


Only one answer please.
Not the best written or the best musical complexity but the one that represents the rock.

My choice: Satisfaction - Rolling Stones

Reasons:
- first notes are like the 5th of Beethoven (when you hear those notes, everybody pumps up the volume)
- still very up to date
- a mix of rock and blues rock and Motown sound
- lyrics talks about disatisfaction of young people vs life, politics, money and women (even B Dylan like that song)
- music is very basic as a good rock song should be
ross2
American Woman - Guess Who
Thunderstruck - ACDC
Eminence Front - Who
and votes for Revolution, Satisfaction and Bohemian Rhapsody
21st Century Schizoid Man is definitely one of the best choices. So heavy... and metal hadn't even been invented yet  
I didn't read through all the posts, and I'm not certain what "Rock" means, but at the moment I have a special love of "A Whiter Shade Of Pale" (as much Classical as Rock, what with it's J.S. Bach compositional elements) and "The Weight", two majestic, soaring masterpieces of song. That they are Rock (if they are) is incidental; a great song is a great song, regardless of genre-style performance. Now, if you asked for a Rock 'n' Roll song, THAT would get a different answer: "I Hear You Knocking", the version by Dave Edmunds.
Money For Nothing has got to be right up there with the best, and now that it’s been banned, well that just adds cred...