Coven. Dignitaries of Hell. 1969.

Once thought to be the diabolical soundtrack to the Tate-La Bianca murders, Coven were considered the first of the doom/goth groups shredding stateside. Rolling Stone magazine even called Sabbath "an English version of Coven."

This song,“Dignitaries of Hell,” accurately describes the demons of the dark arts and their respective ranks and habits. Pretty serious Ghostbusters shit, dudes.

Jinx Dawson, the blonde fox lead singer, has quite the back story herself. From Wikipedia:

Jinx Dawson was a native of Indianapolis, Indiana born on a Friday the 13th (they said it was Jan 13, 1950). The difficult delivery of twins, one dead in the womb, was performed by a Dr. Jinks, so her model mother named her Jinx. She began studying opera and the occult, following in her family's secret society footsteps. She, Ross, and Osborne formed Coven in Chicago in the late 1960s.[1] In 1967 to 1968 they toured on concert bills with Jimmy Page's Yardbirds, the Alice Cooper band, and Vanilla Fudge, among many others. Jinx began and ended each Coven concert with the sign of the horns, being the first to introduce this hand sign into rock pop culture.

Sounds like my kind of gal.