The guy who said Vektor are black metal needs some help, seriously; it's not even similar to black/thrash bands, but more of a 'progressive' variant of thrash alas Voivod.
While I think Mayhem's DMDS is one of the best norwegian black metal albums, I think the rest of their discography is a huge piece of crap and they are a big name only for that album and the Euro controversy. I can see what they did on OaC, but I just don't like it.
Burzum's albums are all great to me, but of course I have my favorite ones. From the pre-prison era I think HLTO is the best in every possible term: production, songwriting, variety, concept, performance, etc. From the new ones, I have problems choosing one over another: Belus is more atmospheric and droning, Fallen is more straightforward and sharp, while Umskiptar it's more contemplative and narrative. Still, Glemselens Elv is the best song Varg has written since his return and completely on par with his greatest compositions.
Ah, and that Countess impression has nothing on controversial: they suck.