I've tried to keep it mostly to 2008 stuff. I'll focus mostly on black metal and leave the other genres to people who know them far better. I'm leaving EPs/Splits out, unless you want that.
Black Metal
First 4 are must hears, the rest have no order.:
Velnias - Sovereign Nocturnal [Blackened Doom]
Misery's Omen - Hope Dies [Progressive Black Metal]
Caïna - Mourner [2007, Still elements of BM at this point, but influences such as Pink Floyd and The Cure make strong appearances, unique BM]
Caïna - Temporary Antennae [2008, Not really BM anymore, but their past puts them here. Again, very unique]
Anael - From Arcane Fires
Arckanum - Antikosmos
Darkspace - Darkspace III
Gris - Il était une forêt... [Depressive Black Metal]
Hennes Siste Høst - Høst [Black Metal in the vein of Taake]
Krallice - Krallice
Lifelover - Konkurs [Black Metal equivalent of Katatonia, quite interesting]
Sombres Forêts - Royaume De Glace
Taake - Taake
Thyrfing - Hels Vite
Walknut - Graveforests and Their Shadows
Winterfylleth - The Ghost of Heritage
Expect the Caina albums to be growers.
Death Metal
Arghoslent - Hornets of the Pogrom
Hail of Bullets …Of Frost and War [Martin Van Drunen]
Doom Metal
Astral Sleep - Unawakening (I'm going to have to post a separate Rec thread on this soon, it's quite good.)
Darkflight - Perfectly Calm
Ogre - Plague of the Planet
Skepticism - Alloy
The Gates of Slumber - Conqueror
Uncategorized
Daylight Dies - Lost to the Living
Opeth - Watershed
Edit: Revised List.