I've made a playlist of songs that make me think of the show, a particular character, hannigram, etc. Here's what I have so far. If you have some songs that remind you of any part of the show, please comment! I'm always looking for great songs :)
Songs for the show (in general): - Sweet Dreams by Marilyn Manson
Songs for Will Graham: - Monster by Imagine Dragons - The Bird and the Worm by The Used - Another Love by Tom Odell - People are Strange by the Doors - Leave Out All The Rest by Linkin Park - Unwell by Matchbox 20 - Dark In My Imagination by of Verona
Songs for Hannigram: - Firewall by Les Friction...