Tally Hall's "Good & Evil" album, released in 2011, features many songs that can be interpreted to fit a horror vibe, such as the song 'Cannibal' or '&' which features quirky lyrics about cannibalism and the concept of &, respectively. Most of Tally Hall's songs feature quirky lyrics, words that are intended to act as a story of sorts. Recommend if you're into other quirky artists like Will Wood, Mindless Self Indulgence, etc.
Next, we have I Monster's "A Dense Swarm of Ancient Stars" which I chose to include because of one particular song, "Lust for a Vampyr," which is an excellent song about being a human in love with a vampyr who will live forever young while you grow old. Excellent song for the Holiday, in my opinion. If you like synths and experimental beats, this is the album for you.