Top ten, alphabetical order:
Ash Borer
Blut aus Nord (both albums)
Echtra
Falls of Rauros
GridLink
Lake of Blood
Panopticon
Petrychor
Wolves in the Throne Room
Other highlights:
Altar of Plagues
Autopsy
Between the Buried and Me
Carbonscape
Decapitated
Fen
Fleet Foxes
ICS Vortex
Krallice
Alison Krauss & Union Station
Liturgy
Moonsorrow
Noisear
Oskoreien
The Psychic Paramount
Paul Simon
Tartar Lamb II
There's still a bunch of other stuff I need to sort through. Opeth isn't as bad as everyone said it was, but I'm not sure it qualifies as a highlight. I've only listened to it a few times though. There are a bunch of other albums I haven't listened to nearly as much as I should, or at all.