Oh boy, if you want some long metal songs… Between The Buried And Me, Dream Theater, Haken, and Tool are the bands to check out.

Between The Buried And Me - White Walls (14+ min)

BTBAM - Blot (10:28)

BTBAM - Human Is Hell (15:07)

BTBAM - Silent Flight Parliament (15:09)

BTBAM - Augment of Rebirth (10:19)

BTBAM - Fossil Genera (12:12)

BTBAM - Swim To The Moon (17:53)

Dream Theater - Scene Four: Beyond This Life (11:22)

Dream Theater - Scene Six: Home (12:53)

Dream Theater - Octavarium (24:00)

Dream Theater - The Shattered Fortress (12:49)

Dream Theater - Breaking All Illusions (12:26)

Haken - Nocturnal Conspiracy (13:09)

Haken - Visions (22:28)

Haken - Carousel (10:30)

Haken - Elephants Never Forget (11:07)

Tool - Reflection (11:10)

Tool - Pneuma (11:55)

Tool - Invincible (12:46)

Tool - 7empest (15:45)

And that’s just limiting to songs that are over 10 minutes… TesseracT and Periphery also have a bunch of longer songs.