This is "post-black metal", and I can't think of a good name... Anyway these black metal albums are heavily influenced by post-rock, post-punk, post-hardcore, and atmospheric sludge metal. You know instead of Slayer it's Sigor Ros, The Cure than Celtic Frost, My Bloody Valentine than Mayhem, Godspeed You! Black Emperor than Emperor...
Agalloch: Marrow of the Spirit
Agalloch's latest and most post-rock based album yet, some stunning blackened music.
Alcest: Ecailles de lune
A sincerely beautiful blend of shoegaze, dream pop, post-rock, and atmospheric black metal, which forms up to straight up ethereal black metal. This already is a definitive album.
Altar of Plagues: White Tomb
Profound Lore 2009
Dynamic and epic sludge soaked atmospheric black metal with post-rock and ethereal black metal.
Bosse-de-Nage: iii
Profound Lore 2012
The best Bosse album yet. They fuse the depressive elements of black metal perfectly with the minimalism of post-rock and some post-punk. A very recent album though I think already a classic to be of post influenced black metal.
Castevet: Mounds of Ash
Profound Lore 2010
Massive sludge soaked progressive black metal with heavy post-hardcore influences. Progressive meaning rather technical like in the veins of math rock that really compliments their post-hardcore influences which overall makes the music dynamic and powerful, also adding more depth in their atmosphere.
Celeste: Morte(s) Nee(s)
Denovali 2010
Devastating sludge soaked blacked post-hardcore from France. The French do know how to make some intense unconventional black metal.
Cobalt: Gin
Profound Lore 2009
Sick American war themed sludge soaked black metal, on the atmospheric sludge side. One of the best black metal albums of the past decade and this band has the potential to release more great albums.
Deafheaven: Roads to Judah
Deathwish 2011
Pretty much perfect atmospheric black metal with post-rock and shoegaze from Deathwish? A label known for it's extreme metallic hardcore which released this absolutely gorgeous blackened bliss album.
Lantlos: .neon
2010 Lupus Lounge
The same singer of Alcest is featured in this other stunning ethereal black metal band. Gorgeous and harsh black metal with genuine post-rock influences.
Tombs: Path of Totality
Relaspe 2011
Already one of the most monolithic albums ever... Massive blackened sludge metal with post-punk and hardcore with some ethereal black metal. Also props for Decibel making this number one for their 2011 list, this band needs more recognition...
Twilight: Monument to Time End
Southern Lord 2010
One of the best metal super groups. This album features N. Imperial on vocals (Krieg), Aaron Turner on guitars effects and vocals (Isis, Old Man Gloom), Stravos Giannopulos on guitar (The Atlas Moth), Sanford Parker on keyboards and effects (Buried at Sea, Minsk), Wrest on drums bass and vocals (Leviathan, Lurker of Chalice), Blake Judd on guitars and vocals (Nachtmystium). An extremely talented group of musicians on one incredible album.