What are the best Halloween-themed music for today?

Depending what you look for.

For horror role-playing, I sometimes put various dark ambient playlists from youtube/spotify with artists like Atrium Carceri or Cryo chamber not sure whether they really have an audience out of the rpg community

Doom metal, may also be a good choice Blood Ceremony has some pretty dark tones (even though their latest Album is more modern blues than doom metal) or Uncle acid. Iff you're into the slow music you can go for band like Monarch!

Danse Macabre, classical music.

Anything by Gnome.

I don't care if Gnome isn't "Halloween themed," I'm still gonna recommend them to anyone I can. They have badass guitar riffs and choruses, and they always wear their pointy hats.

Thriller of course.

Coven - Satanic Mass (not "music")

Bach - Toccata And Fugue In D Minor

Victoir Peraino's Kingdom Come - I Put a Spell on You

Anything Rob Zombie

big dick randy

Lament of the Highborne - WoW

(Every Day Is) Halloween - Ministry https://youtu.be/mXtKicX5eDo

Halloween - Mastodon https://youtu.be/eCVn0mjvD3g

Halloween - Misfits https://youtu.be/jfJkvnXx8vw

My favorite Halloween playlist. I return to it every year!

Warren Zavon Werewolves of London

Donovan Season of the Witch

(Personal fave) Bing Crosby The Headless Horseman

Spooky Beat

If you enjoy folk songs or ghost stories, take a listen to Charming Disaster

https://www.youtube.com/watch?v=-aH-pP3PAIc

The spirit halloween trilogy

I know Halloween is technically over for pretty much anyone, but I personally really enjoy The Evil Eye and The Hideous Heart by Alan Lee Silva. It's a string orchestra piece that if I remember correctly is based on The Tell Tale Heart.