You may or may not know them but I would recommend G.I.S.M or Bethlehem(Their second album or self titled albums especially.) my tastes are not the most niche, and I would recommend this band called Faustus, but there are just about ten other bands with the same name(One of which is a thrash band from Seattle, Washington.) honestly, I am sure all the Faustus are great, my recommendation is to pick one Faustus at random and listen to someone’s black metal project from the late90s to 00’s.
There is also Ebony pendant, who i got to see live as they were playing at a venue I frequent. Their frontman wore a silly cloak and i thought their music was just lovely. And um… brutal pig. A Mexican grind/death metal band, though I would be hesitant to just dive into their music, the sounds can be accosting to some.(learned this the hard way, unfortunately.)