If you like this, I suggest a few other post rock bands I enjoy, Explosions in the Sky (who have done a ton of soundtrack stuff for TV and film), God is an Astronaut, and Sunlight Ascending.

Moody, building instrumental music can go under many, many sub-genres (see previous discussion in this forum), but, if we allow a spectrum for this, then we can all be introduced to some great music along the lines that Shane has started and others can add to.

Some can be more loud, some can be drifting and more to the ambient side of things.

Favourites of mine include:

This will destroy you

Robin Guthrie (ex Cocteau Twins and def on the more quiet side)

This genre of music reminds me of the guitar instrumental stuff I used to listen to a lot back in the eighties like Joe Satriani and Vinnie Moore, although with most of the post rock bands even though they are guitar-driven bands, the guitars are more textural than showing off how great of a guitar player they are.