I don’t see Explosions in the Sky mentioned yet but they’re definitely worth a listen.

There is a whole album for Dwarf fortress that is just incredibly atmospheric guitar, give it a listen. Personal favorites: Strike the Earth and Vile Force of Darkness. They both slap so hard

I love the Celeste OST

Philip glass’s etudies #6

oh and Steve reich made a duet with glass and others

Boards of Canada for some lofi nostalgia

Streets of Rage soundtrack, Sonic 1-3, donkey Kong country aquatic something is a killer

Commix - call to mind is some classic dnb, some lyrics but often looped and mixed to be more of just another instrument

Sasha - airdrawndagger, more ambient slower melodies

Tycho - dive

Anything by Philip Glass or John Williams

Cloudkicker - Beacons, progressive metal band instrumentation kinda like animals as leaders

2010 Toyota Corolla - 2003 Toyota Corolla is the new national anthem

Bohren & der club of gore for some slow noir jazz

Hans Zimmer. Add collabs with Lisa Gerrard and Klaus Badelt for Gladiator and Pirates of the Caribbean. Honestly, just go through the whole range of emotions and watch/listen to his Live in Prague. Start to finish it’s beyond wonderful. His soundtrack to Madagascar has no reason to slap as hard as it does.

Tool - Triad
Faith No More - Woodpecker From Mars
Star Trek II soundtrack
Batman (1989) soundtrack

Stick Figure (reggae) has some of his albums as instrumentals only on youtube. I can also say you might try listening to his regular albums. It certainly helped me get through a rough patch recently. I find his music and lyrics to be very uplifting.

Spokey Dokey by the SEATBELTS

And

It’s Never Too Late by Tommy Emmanuel

Also

Lazy Place by Caravan Palace

And honestly anything by Stone Rebel

Edit to add: OVERWERK does EDM-ish mixes/covers of classical music. Toccata is really good

I really like The Budos Band and Ratatat

https://www.youtube.com/watch?v=jaM2i7ntCZk&list=PL6xZBaK9f7MQIgRs9rMFChF1kPe12_4gd

That should be a playlist, if not just tube “not all who wander are lost thile”

https://youtu.be/3xQmJ_vxHB4

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Passacaglia by Bear McCreary from Battlestar Galactica is the first thing that pops to my head.
https://youtu.be/Y9CqU1aMqyg

The rest of the BSG soundtrack is incredible in this regard as well.

World of Warcraft has some of the best instrumental music out there in general though im not sure if it counts as instrumental as choir is often used. This recent orchestra rendition of Wrath of the Litch King expansion is incredible: https://youtu.be/DoRkjNKOe20

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Big fan of We Lost the Sea, especially the album Departure Songs.