What is the epic song of a group?

The Ballad Of Dwight Fry - Alice Cooper

Robin Trower - Too Rolling Stoned
ACDC - The Jack
Zappa, that twisted genius reinvented himself so many times who the hell knows.
Perfect Alice Cooper tune.  Alice himself said that was the song he most identified with.  

Lady Fantasy - Camel
Gates of Delerium - Yes
Question - The Moody Blues
Karn Evil 9 - ELP
Nine Feet Underground - Caravan
I Walk the Line- Johnny Cash
Ripple - Grateful Dead
Free Bird - Lynyrd Skynyrd. 
Summer of 69 - Brian Adams
Jungleland - Bruce Springsteen
Living on a Prayer - Bon Jovi
Abbey Road Medley - The Beatles
Someone Saved My Life Tonight - Elton John
Italian Restaurant - Billy Joel
Suppers Ready - Genesis
I'd Love to Save the World - Ten Years After
Desolation Row - Bob Dylan

Tomorrow Never Knows or simply Revolver - Beatles
Mellow Yellow- Donovan
Suite Judy Blue Eyes - CSN

No offense to others posting about The Beatles, but for me it's got to be, A Day In The Life.

https://www.youtube.com/watch?v=usNsCeOV4GM