Well if you want real black metal. I think its pure crap but I can recommend some known bands "true" blackers like since I work at a Metal store.
Try:
Burzum
Behemoth
Marduk
Emperor
Borgoroth
Gorgoroth
Immortal
Thats ultimate Black metal the blackest of black
Me im more into Thrash, Industrial, Death Metal.
Death metal bands:
Death
Carcass
Obituary
Six Feet Under
Cannibal Corpse
RedSkull (fairly unheard of band look up on soundclick if your interested)
GoatWhore (its kinda like Death metal, its like a medium between death and black)
Kataklysm
Thrash Bands:
Metallica
D.R.I. (aka Dirty Rotten Imbeciles)
Lamb Of God (considered either thrash or death i see them as thrash)
Machine Head
Gojira (just like LOG can be considered either or)
Kreator
Sodom
Pantera
Municipal Waste (only a few of these)
Sadus (can be considered death or thrash)
Sepultura
Slayer ( death or thrash i see more as thrash though)
Megadeath ( Im not to big on em but i'll listen to em if its on the radio)
Industrial:
(this is a growing list as Saxon recommends good artists like always)
Wumpscut
Cyborg Attack
Psyclon 9
Combichrist
STRAFTANZ
But I prefer all types of music except the newer aged rap. Old stuff is good, its just this new stuff that makes my ears and eyes bleed. OH I take that back i dont like all types, there is one music i utterly dispize and that would be
COUNTRY MUSIC
RAAAHH that stuff makes me hate.