God Knows by Ayana Hirano (this may be spelt wrong)
Take a Bow, Assasin, Knights of Cydonia, and Supermassive Black Hole by Muse
Flight of the Valkeryies
Duel of Fates
One Winged Angel
Cannon in D Major by Bach (cant spell his last name) (Yall forget the classics)
The Beginning is the End is the Beginning and The Mellon Collie and the Infinite Saddness by Smashing Pumpkins
In the Gadda of Eda by Iron Butterfly
Stairway to Heaven by Led Zepplin
The Pokemon Theme
The Hamtaro Theme
The Jurrasic Park Theme
Unforgiven, Sad But True, One, Master of Puppets, Sanaterium, The Memory Remains, and Enter Sandman by Mettalica
Hanger 18 by Megadeath
Sayaendo by NewS
The Hell March (If you don't know this song, go out and buy Command & Conquer: Red Alert, Red Alert 2, and for the sake of getting the best computer game ever, Red Alert 2: Yuri's Revenge)
And last but not least; Phenomenon by Thousand Foot Krutch
There is not one song by led zeppelin that should even be considered "epic." Amon Amarth, on the other hand, is the most epic band ever! 99.9% of their songs are epic as hell. Go check Amon Amarth out if you haven't already.
Don't argue with me on this one unless you have cold, hard evidence to back you up:
"A Day In the Life" - The Beatles
My Defense: The almost unnatural-sounding yet rhythmic flow of the song as it progresses from the few simple, initial instruments to the grandiose crescendo of the symphony in its first climax;
then john, george, paul, and ringo throw an alarm clock at our heads complete with a story about someone going to work and a series of aaaahhhs;
this is all concluded with one more verse, an even greater orchestral climax, and what is the most recognizable sound ever in the history of music, next to even Beethoven's 5th Symphony or Vivaldi's Four Seasons in my opinion: three pianos simultaneously striking multiple octaves of the E-major chord.
If this is not considered "epic", then today's society has no idea whatsoever what it is missing!
Definitely right up there. Stairway to Heaven, You Can't Always Get What You Want and Hurricane are up there, too, if we're just talking about contemporary music. Otherwise, it'd be Ride of the Valkyries or O Fortuna probably.
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Thanks to Badwolf for the great sig!
There are some soundtracks that are epic, like the Halo series, but personally I don't believe that the most epic songs would be found in media outside of the music genre (i.e. video games, movies, tv shows, etc.)
Other songs to think of:
Two Step - Dave Matthews Band
Roundabout - Yes
Killing in the Name Of - Rage Against the Machine
Betrayal - Tim Reynolds
Time - Pink Floyd
Let Me Out - Electric Mary
War Pigs - Black Sabbath
Bad - U2
Viva La Vida - Coldplay (you don't have to be a wuss to listen to them!)
Empire State of Mind - Jay-Z
Dead Wrong - The Notorious B.I.G.
Cocaine - Eric Clapton
Ina Gadda Da Vida - Iron Butterfly
5th Symphony - Ludwig Van Beethoven
Jump Around - House of Pain
Bohemian Rhapsody by Queen (A Night at the Opera)
Viva La Vida by Coldplay (Viva La Vida)
Stairway to Heaven by Led Zeppelin (Led Zeppelin IV)
Scenes from an Italian Restaurant by Billy Joel (The Stranger)