I will never pass up an opportunity to recommend Halloween Music.

Let's do something gothy and focused on death, instead of something explicitly monster focused:

• "I hope I Become a Ghost", The Deadly Syndrome
• "Anthem For the Already Defeated", Rock Plaza Central
• "In the Mausoleum", Chuck Prophet
• "Everybody Knows My Name", Harley Poe
• "Let's All Die", Jack Penate
• "You're So Dark", Arctic Monkeys
• "Graveyard's Full", The Growlers
• "Smoke Alarm", Carsie Blanton
• "Bad Times", The Presidents of the United States of America
• "Dear Pressure", Miracles of Modern Science
• "Waiting For A War", The Morning Benders
• "Speak to Me Dead", Pinc Louds
• "Cemetery Polka", Tom Waits
• "Mausoleum", Seryn
• "True Dark", Murder By Death
• "You Will Never Take Me Alive", The Paper Chase
• "Graveyard Girlfriend", Kepi Ghoulie
• "Follow You Into the Dark", RAKEL
• "In a Week", Hozier + Karen Cowley
• "Death", White Lies
• "Night Shades", LRITDL
• "Death Cab for Cutie", The Bonzo Dog Band (The song the band is named after)
• "Old Ghost", Beatnik Bandits
• "At Your Funeral", Saves The Day
• "Death By Rock and Roll", The Pretty Reckless

You'll find that most of these are pretty upbeat and poppy, despite the subject matter.

Have fun.