Yes, I know not all of these are pure traditional black metal...but ALL OF THEM ARE AMAZING:

Ceremonial Castings
Xasthur
Judas Iscariot
Wolves in the Throne Room (a local band for me^^)
A Cloud Forest
Blood Cult
Depressive Years
Forgotten Land
I'm In A Coffin
Infester
Inquisition
Lamentations of the Ashen
Lost Inside

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"Your GOD died on a cross. Mine holds a hammer in his hand. Make your own conclusions." --Nergal (Behemoth)

Don't know so much about USBM, but Xasthur and Happy Days are awesome bands (after several listenings) I will listen to other USBM bands which are mentioned in this topic.

^^