Post either i) properly released genre compilations that you think represent an ideal introduction to a specific genre, or ii) your own take on a genre compilation (as a spotify playlist, mixcloud etc mix or tracklist)...

To kick things off, I'd like to nominate 'Monsters, Robots and Bugmen' as a great intro to post rock:

http://www.allmusic.com/album/monsters-robots-and-bug-men-mw0000954324