My favorite Black Metal Album: Windir - Arntor, Ein Windir - which is also where my username is from.
Most Accessible: Mgla - With Hearts Towards None. It's brilliance lies in its no frills simplicity. Very formulaic which gives the listener an opportunity to understand each song a little better. Vocals [in English] are easy to follow with a lyric sheet. Very good production value.
Suggestion based on your tastes:
Tempel - On the Steps of the Temple - Instrumental with use of 8-string guitar.
Death Fortress - Deathless March of the Unyielding. I'm not sure why I think you'll like it, I just do. It's on the heavier/deathy side of Black Metal. Busy riffs that flow very well with each other. Very enjoyable, even for someone that isn't familiar with Black Metal.
Krallice - I don't really think they fit the Black Metal mold but they are revered in some circles. They're a little too technical for my taste but it could be up your alley.
and last but absolutely not least. The legendary Enslaved. If Progressive Black Metal is a thing (which it is) Enslaved paved the way and defined the entire genre. Every album of theirs is brilliant. I would strongly recommend grabbing their entire discography and listening from start to finish.
As a matter of fact...I want to change my list to be nothing but Enslaved.
Favorite Album: Blodhemn
Isa
Most Accessible: Below the Lights