I'm listening to the Stormkeep EP and it's excellent! I got to say that the band logo and album artwork are amazing!
I didn't mention Summoning and Emyn Muil, because I feared it would throw the recommendations on the path of Epic Atmospheric Black Metal. I like them, and they do combine black metal and dungeon synth, but I feel like they're somewhat different. I can't explain why.
Thanks for all the recommendations, I'll try them all.