https://youtu.be/ny0G0mkN62M?list=RDny0G0mkN62M

"Always Look On Bright Side Of Life."

Seriously no one said REM??? Maybe im old. Fist song i thought of ha

Olivier Messiaen, Quatuor pour la fin du Temps (quartet for the end of time) was the first one I thought of. It was written in 1941 while the composer was interned in the German Stalag VIII-A POW camp. I'm fairly sure I've listened to it but I don't remember anything about what it was like. Its fame is partly from the circumstances of its composition and premiere.

https://en.wikipedia.org/wiki/Quatuor_pour_la_fin_du_temps

And on a lighter(?) note, Tom Lehrer, So Long Mom.

Thanks a ton for all the awesome suggestions guys! This sucker's getting more and more awesome by the second :D

Komm süsser Tod

NICE

That Handsome Devil - Elephant Bones

Slayer - Skeletons of Society

Megadeth - Set the World Afire

Guns n Roses - Coma

Nightwish - The Greatest Show on Earth

First tracks that come to mind that aren't already on your list:

• Doomtree - The Grand Experiment
• Bad Religion - No Control and/or Atomic Garden
• Porno for Pyros - Pets
• The 1975 - Love It If We Made It

EDIT: Forgot

• Tom Lehrer - We Will All Go Together When We Go

Throw some Maiden on the list.

2 minutes to Midnight

Hallowed be Thy Name

Rome is burning:

https://www.youtube.com/live/dpn5Rff4gUk

Also, your apple account has a real name so you just doxxed yourself, might want to delete.

Skeeter Davis “The End of the World” is a tonal shift from most of what you have there but after watching Girl Interrupted, it would be a must have on the list for me.

https://music.apple.com/us/album/the-end-of-the-world/258618389?i=258619200

Ultravox - Dancing With Tears In My Eyes

https://deltaartmusic.bandcamp.com/track/dancing-with-tears-in-my-eyes?search_page_id=4797714515&logged_out_mobile_menubar=true

The end by the doors

JAMES - Girl at the End of the World

https://youtu.be/CzlB8vCkQIk

Leftover Crack - Soon We'll Be Dead

Not as doom and gloom but I feel like "We'll Meet Again" could fit the theme

https://en.wikipedia.org/wiki/We%27ll_Meet_Again

probably any Weyes Blood song but you need

It's not just me, it's everybody

https://youtu.be/3g7BSnavHH8

Gustav Holst, Neptune (from The Planets). Really strikingly captures the sense of the outer edges of our solar system, even if it's not the whole world.

Probably not what you're looking for, but I thought I'd leave this classic for your consideration.

Not sure if it quite matches the vibe you got there, but "Goodbye to a World" by Porter Robinson feels very much like an end of the world song to me.

Klaus Nomi - After the Fall

NEEDTOBREATHE - Let Us Love

U2 - Until The End Of The World

Machine Head - Now we die

https://music.youtube.com/watch?v=BtqhK36JATc

Lord of the Lost - Raining Stars

https://www.youtube.com/watch?v=kXl9hE4yFQY

Hawkwing - The Golden Void

https://www.youtube.com/watch?v=cEwmz6YvyI4

Slayer south of heaven

Heretoir - The Ashen Falls, some big layers extinction metal dirges

Municipal Waste - Escape from New York, I'm just a sucker for intros with movie clips and thrash with post apocalypse vibes

Electric Wizard - Funeralopolis, earth is a graveyard planet

Astral Projection - Enlightened Evolution

Portishead - Roads

Karn Evil 9 - Emerson, Lake and Palmer

Eve of Destruction - Barry McGuire

Ball of Confusion - The Temptations

Goodbye Horses by Q Lazzarus

"I've seen them come, I've seen them go." And you said, "All things pass into the night."

Would You Be Impressed? - Streetlight Manifesto

End of the World - Beast in Black

FUTURE IS DUMB - Jeff Rosenstock

Down, Down, Down to Mephisto's Cafe - Streetlight Manifesto

One Foot on the Gas, One Foot in the Grave - Streetlight Manifesto

If and When We Rise Again - Streetlight Manifesto

I Melt With You - Modern English

Aphrodite's Child's album ‘666’ is based on the Revelation.