I've been listening to a lot of dungeon synth as of late, the more old school black metal inspired sort rather than the newer (and more cleanly produced!) fantasy sort. The Pictureplane Dungeon Synth mix on here is dope af if you're new to the genre. viewtopic.php?t=7045#anchor12
I've been taking my project into a more "witch metal" direction, merging witch house with death/doom and black metal so there's been quite a bit of that as well. VOIDNAGA has been a recent accidental discovery that I've been digging a lot. Its solid modern black metal with death and doom touches, kinda "witchy" in that the lyrics are inspired from verses roughly translated from ‘Malay Charm Books’
Maybe not so "witchy" but I've been loving ░█░█░░█░█░█░ by KEYGEN CHURCH, the artist describes themselves as "Computer Generated Ceremony", basically gothic church music/electronic metal made entirely on synths.