Jack Black's hilarious and suprisingly musically talented band Tenacious D got their name from a Mike Ditka line for good football defense. The cover of their debut album is a satire on metal (much of the music is as well). The boys are standing naked on a pentagram with a demon arising behind them. Make sure to check out the track "Dio".
Many give credit to Venom for painfully giving birth to the genre of Thrash Metal. Besides this accomplishment they also took Satan obsession to the next level. "Welcome To Hell" was the band's debut and the production is some of the worst you'll hear anywhere, but then again, what else would you expect in Hell?
"Show No Mercy" was released in 1987 and at the time Slayer, like Venom were building a new extreme metal empire that would grow and influence many future metal musicians. The cover of "Show No Mercy" utilized the pentagram, but as drawn with swords! How fuckin' metal is that!
Any pentagram playlist needs to include the band that is named after the symbol. As you would expect Pentagram is a metal band. They have been around since the early 1970s and did not release "Relentless" until after 15 years of struggle. So it seems that selling your soul to Satan does not necessarily mean a quick turn-around.
Three Sixes - Three Sixes In addition to the pentagram, the number 666 has been overused to the Nth degree to convey a band's allegiance to Satan. Three Sixes takes the symbol, but in an attempt to show intelligence they actually spell it out instead of using the number itself. The music mixes thrash and punk, but it's the priest and pentagram on the album cover that ticks up the evil factor.