Explosions In The Sky: The Earth Is Not A Cold Dead Place (2003)

I can't say I'm entirely clear on the whole "post-rock" genre, which seems (depending on whom you ask) to encapsulate pretty much anything that is either instrumental music and/or experimental rock-adjacent music that eschews traditional verse-chorus-verse structures. 

Whatever. I don't listen to a lot of instrumental music apart from Brian Eno's ambient works, but I've developed a real love for Explosions in the Sky, who do a fascinating job of blending ambient music with more chaotic post-punk ...