What is the epic song of a group?


I will start. I vote for Stairway to Heaven for Zep. Its grand with a great finish. I will throw in Salisbury by Uriah Heap. Ok lets see some posts of what you think is a groups masterpiece.
128x128blueranger
roxy, I admit to being one who didn't take the term "epic" literally enough. I named titles which I consider epically great, but that wasn't the question. Some of mine do fit the term, such as Richard Thompson's "Shoot Out The Lights" and Television's "Marquee Moon". Here's another: Dave Edmund's reworking of Khachaturian's "Sabre Dance" when he was in the group Love Sculpture.

 Hendrix   " Voodoo Child (Slight Return)"
(Originally titled "Voodoo Chile (Slight Return)" on UK Track release)
Someone mentioned You Really Got Me for the Kinks.  I would say that was their iconic song, but I think their "epic" would be Waterloo Sunset.
Regarding Jimi Hendrix, I will have to disagree and say 1983 (a Merman I should turn to be).