This is my list. Keep in mind that songs that are farther down the list are by no means of poor quality; they just aren't the best of the best. ("Title" - Band (Length))
- "A Change of Seasons" - Dream Theater (23:09)
- "2112" - Rush (20:33)
- "Thick As a Brick" - Jethro Tull (43:30)
- "Shine On You Crazy Diamond" - Pink Floyd (25:54)
- "Karn Evil 9" - Emerson, Lake, & Palmer (29:38)
- "A Passion Condensed" - Finch (20:09)
- "Supper's Ready" - Genesis (22:53)
- "Octavarium" - Dream Theater (24:00)
- "Nine Feet Underground" - Caravan (22:44)
- "Echoes" - Pink Floyd (23:31)
- "Duel With the Devil" - Transatlantic (26:44)
- "In the Presence of Enemies" - Dream Theater (25:38)
- "Sleeping in Traffic" - Beardfish (35:44)
- "All of the Above" - Transatlantic (30:59)
- "The Count of Tuscany" - Dream Theater (19:16)
- "Hemispheres" - Rush (18:08)
- "Tarkus" - Emerson, Lake, & Palmer (20:39)
- "The Revealing Science of God" - Yes (22:37)
- "Dogs" - Pink Floyd (17:04)
- "Moon In June" - The Soft Machine (19:08)
- "The Odyssey" - Symphony X (24:16)
- "38th Floor" - Hourglass (21:22)
- "Stranger In Your Soul" - Transatlantic (30:00)
- "Hymn to Him" - Mahavishnu Orchestra (19:18)
- "Lizard" - King Crimson (23:23)
- "Where Are They Now?" - The Tangent (19:13)
- "The Rime of the Ancient Mariner" - Iron Maiden (13:09) -Despite its briefer length, it's still 100% epic.
- "Send a Message From the Heart" - Karmakanic (19:32)
- "Close to the Edge" - Yes (18:43)
- "Atom Heart Mother" - Pink Floyd (23:44)
Honorable Mentions (in no particular order):
- "In Darkest Dreams" - The Tangent (20:01)
- "The Ikon" - Todd Rundgren's Utopia (30:26)
- "The Gates of Delirium" - Yes (21:56)
- "Hamburger Concerto" - Focus (20:20)
- "Islands" - Singularity (20:27)
- "The Divine Wings of Tragedy" - Symphony X (20:40)
- "The Ivory Gate of Dreams" - Fates Warning (22:05)
- "Morning" - T2 (21:12)
- "Of Longings, Suitors, Deities And Quests..." - Nathan Mahl (24:07)
- "El Regreso (The Return)" - Nexus (27:50)
- "Minds Of Mortal Men (Meander Tales)" - Simon Says (25:40)