I don't do Spotify but here have some dungeon synth:

• https://amagiclantern.bandcamp.com/album/skeleton-key
• https://luxviridis.bandcamp.com/album/lords-and-ashes
• https://castlezagyx.bandcamp.com/album/swords-against-sorcery
• https://dronn.bandcamp.com/album/arcanvm-agnosticvm

Also here's some more shit I love

• https://dan-terminus.bandcamp.com/album/the-wrath-of-code-2
• https://dan-terminus.bandcamp.com/album/automated-refrains
• https://dan-terminus.bandcamp.com/album/last-call-for-all-passengers
• https://alicemako.bandcamp.com/album/fortress
• https://dandavelarson.bandcamp.com/album/bloodbath
• https://glitchblack.bandcamp.com/album/emergent-behavior
• https://xetrovoid.bandcamp.com/album/cyborg-march
• https://deadlife.bandcamp.com/album/variations-on-the-resolve-3
• https://deadlife.bandcamp.com/album/city-of-eternal-rain
• https://deadlife.bandcamp.com/album/tortured-waters
• https://mellowfields.bandcamp.com/album/mellow-fields
• https://newretrowave.bandcamp.com/album/deeper
• https://shredder1984.bandcamp.com/album/dystopian-future
• https://megadrive.bandcamp.com/album/198xad
• https://theeanachronist.bandcamp.com/album/anachronists-self-titled-album
• https://caspromusic.bandcamp.com/album/head-reset
• https://newretrowave.bandcamp.com/album/evil-squad-ii
• https://gadgetor.bandcamp.com/album/the-end-of-flesh
• https://isidorbobinec.bandcamp.com/album/lord-of-synth
• https://fixions.bandcamp.com/album/genocity

I have like a lot more but It's getting late and I don't want to overwhelm