I'm going to give you a list of obscure/lesser-known black metal bands, and bands that continually twist and distort the definitions of (orthodox) black metal:
Klabautamann - progressive black metal with folk, my favourite band together with
Valborg,
Ekpyrosis and other Zeitgeister Music bands
Valborg - mix of black/doom/death/gothic metal; really weird stuff, cannot be placed in any known subgenre - which is why I like it so much!
Ekpyrosis - avant-garde black metal, it's hard to describe; basic yet complex.
Urfaust - black metal, unorthodox as hell yet still black metal through and through, you'll have to get used to the vocals ... among other things
Murmuüre - avant-garde/experimental black metal of the highest order, really, really weird
ColdWorld - atmospheric black metal, highly recommended
The Ruins of Beverast - black metal, latest album,
Foulest Semen of a Sheltered Elite, has some doom metal in it
Ulver - started as black/folk metal in
Bergtatt, made a folk album in
Kveldssanger, became raw black metal in
Nattens Madrigal and then changed into an avant-garde/ambient/electronica band ever since; really awesome and diverse stuff - you should definitely check out their non-metal albums!
Blut aus Nord - not really unknown in most circles, but definitely something you should give a listen
Deathspell Omega - avant-garde black metal, mindblowing and really sick stuff; give
Paracletus a try, you won't regret it.
Westering - post-black metal/shoegaze, shapes vistas of claustrophobic dimensions and a suffocating emptiness; horribly underrated
Onirik - orthodox black metal from Portugal, very good
Nagelfar - awesome black metal band that broadened the horizons of their genre by combining their Germanic sounds with electronica and other elements, highly atmospheric and merciless in its ferocity, definitely worth a listen!
I'll stop now because I could go on forever... If you have any more questions regarding black metal you can always ask me, though you should definitely try out some bands from Zeitgeister Music (black metal or not)
