Ooh, my favorite genre!
I absolutely second a lot of these recommendations (This Will Destroy You, Te, Caspain, Pirate Ship Quintet, Saxon Shore, Yndi Halda, Do Make Say Think)
I would add:
- The American Dollar
- Tarentel [based upon what you like, ONLY their very early stuff. Pretty much "From Bone to Satellite," which, incidentally, is one of my all time favorite albums, their contribution to the "Mort Aux Vaches" series and a couple others)
- The Ascent of Everest [standard post-rock sound pretty much but very well done and with some very well implemented vocals]
- Because of Ghosts
- Your Ten Mofo [God-awful name but quite the band]
- Destroyalldreamers
- The Drift [a different take than most of the bands above. They're a dub/jazz/rock band. Not even really post-rock at all but I like to recommend them every chance I get b/c they're brilliant and sort of fit the bill here).
- Sweek [Sweek are one of my favorites!! A huge band from Sweden with banjos and all sorts of cello/violin action on top of awesomely intense, crushingly loud crescendos and such. Listen to "The Unbelievable Cinematic Crash" right now!]
- Sparrows Swarm and Sing [These guys are writing all the songs Godspeed never got around to. They sound remarkably similar. This is a good thing]