Lore might be a good candidate - one narrator relaying stories from history that are dark or spooky in one way or another. It’s quite fun and well-produced.

https://www.lorepodcast.com/

Be warned that he approaches history from a folklore standpoint and will sort of tell you the spooky story version of what happened and how it impacts modern day pop culture - so if you compare one of his (fairly short) episodes on a well-docunented famous murder or something to a deep-dive series or book on the subject it will be missing information.