What is the epic song of a group?

"Stranglehold" by Ted Nugent

Another example would be "Eruption" by Focus. "Warning" by Black Sabbath. "Fire on High" by ELO. "2112" by Rush."Funeral for a Friend" by Elton John. "Close to the Edge" by Yes. 

You Really Got Me - The Kinks

I need to stop these songs are popping in me head in no particular order. 

Starman - Bowie
Time of the Season - The Zombies

For me the most epic Deep Purple song would be "Child in Time"

Cake  "Short Skirt, Long Jacket"
Aldo Nova  "Subject's Theme"
Night Ranger  "Sister Christian"
Black Sabbath  "Iron Man"
Van Halen  "Jamie's Crying"
Roy Orbison  "Cry'n"
Ringo Starr  "Photograph"
George Harrison  "While my Guitar Gently Weeps"

Obviously Bohemian Rhapsody by Queen possibly the best known Epic group song of all.

A Day in the Life works fine for me for The Beatles as well. I’d also take Twist and Shout.

Echoes by Pink Floyd.

Graceland by Paul Simon

Suspicious Minds by Elvis

What’s Up? 4 Non Blondes

Dream On Aerosmithh

Back to Black - Amy Winehouse

Ramblin Man Allman Brothers

Just Between You and Me - April Wine

Private Sorrow/Balloon Burning - Pretty Things 

Janis Joplin "Me & Bobby McGee"
Aretha Franklin "Respect"
Bill Withers "Use Me"
Otis Redding.... the above....
Isaac Hayes "Theme from Shaft"
Peter Frampton "Do You Feel Like We Do"
Peter Gabriel "Sledgehammer"
T Rex "Bang a Gong"
Mountain "Mississippi Queen"
Ram Jam  "Black Betty"

I decided to forgo the major artists that have decades of output. (Where do you start?)

Smoke on the Water - Deep Purple;
Sultans of Swing (especially the Alchemy live version) - Dire Straits;
Whole lotta Rosie - AC/DC; 
Psycho Killer - Talking Heads;
Contentores - Xutos&Pontapés;
Chiclete - Táxi. 

Brand Funk Railroad. "Lonliness" over "Closer to Home" for me

With the Beatles there are a lot of songs to chose from. In my choice of Tomorrow Never Knows placed last  on Revolver though it was the first recorded ushered in a new chapter , I guess the last chapter,  which in my mind made it more epic. 

Brownsville Station "Smokin’ in the Boy’s Room"
REO Speedwagon "Ridin’ the Storm Out"
Kansas "Dust in the Wind"
Jackson Browne should be "These Days" but probably "Running on Empty"
Gregg Allman "Midnight Rider"
Thin Lizzy "Johnny the Fox"
Warren Zevon "Warewolves of London"
Foghat "Slow Ride"
Eric Clapton "Layla"
Steely Dan "Reelin’ in the Years"
Doobie Brothers "Jesus is Just Alright"
Neil Young.. simply because of radio play "Southern Man" or "Old Man"
America "Ventura Highway"
Joe Cocker "With a Little Help From my Friends"
Sweet "Ballroom Blitz"
Sniff n’ the Tears "Driver’s Seat"
Walter Egan "Magnet & Steel"
Dire Straits because of MTV "Money for Nothing"
Pink Floyd "Money"
Bob Seger "Night Moves"
Grand Funk  "We're An American Band"

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

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

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

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.  

The Ballad Of Dwight Fry - Alice Cooper

The Doors - Light my Fire.

+1.  The full 7 minute version, of course, featuring the amazing keyboard work of the late Ray Manzarek.

Regards,
-- Al 

Green Grass and High Tides / The Outlaws

The Doors - Light my Fire.
The Cream - Sunshine of your Love.
The Who - Won't get fooled Again.

Rolling Stones, Gimme Shelter

Miles Runs The Voodoo Down - Miles Davis                                                                  The Unknown Soldier - Weather Report      A Love Supreme - John Coltrane

Moan'n - Art Blakey and the Jazz Messengers

Sorry for the strange layout! My phone is the culprit - or Audiogon!

Boston  "Long Time"
Simon & Garfunkel  "America"

Purple Haze - Jimi Hendrix                            Dark Star - Grateful Dead                              Satisfaction - Rolling Stones                        God Save The Queen - Sex Pistols              Horses - Patti Smith                                      White Room - Cream                                      A Salty Dog - Procul Harum                           Eight Miles High - the Byrd's                          Stolen Moments - Oliver Nelson