Allmusic.com says that "Death Cult Armageddon may be the closest-to-perfect amalgamation of the hallowed genres of black, death, thrash, gothic/industrial, and symphonic metal ." Well, I am not sure if that's true or not, but the pentagram fuckin' rocks!
The band Pentangle was a folk group that featured Bert Jansch and John Renbourn. This double album was released in 1968 and is probably the one you want if you are not familiar with the band. This is one of only a few albums on the list that features the acoustic guitar. So it's a more "woodsy" occult we're talking about here.
Hecate Enthroned are a British death metal band whose original vocalist left to join Cradle of Filth, but eventually returned. Was it the powerful pull of Satan who brought him back? We may never know for sure, but we do know that the Devil digs bands with pentagrams on their album covers.
Anthrax spent decades doing heavy metal without the use of a single pentagram, but on this 2002 release they show up on the cover wearing pentagram t-shirts. The members seem to be pulling their fans back into the fold with the power of the ultimate metal symbol. Could it be Satan?