Favorite Artists Working In The Occult?

I was wondering who everyone's favorite artists working in the occult might be? Obviously Giger's hugely influential as an artist working in the occult but as a casual fan of art, I was curious as to other artists that might be working within similar themes.

 

I think HR Giger was a member of the Swiss branch of the OTO.

 

I'd heard that too - definitely not hard to believe. In fact, I'd be more shocked if he wasn't!