Black Metal.

but plenty of Varg himself is.

That's not entirely true either. Varg is very far from being a socialist. He used to call himself a national socialist or nazi, but later realized that was by no means the best term for his views (and it isn't). He is surely a nationalist and racialist (note: not racist), but without the socialist you can't really be a national socialist. If he made music that reflected his socio-political views directly it would be nationalist black metal, not NSBM.
 
I just gave Wanderings by I Shalt Become a listen; good Burzumesque stuff without being another Varg wannabe. Reminds me of Fullmoon too in a way.
 
I try and try but I can never really get into Emperor. I don't dislike them, but at this point in time I do not really love them either. They are a good listen every once in a while, but far from my favorite. That being said, the "Emperor" ep/split is my favorite thing they have done atm.