Re: Black Sabbath “inventing” Heavy Metal. The term was coined by Steppenwolf in their song “Born to be Wild,” and one could argue that the band’s hard-rockin’ material presaged “metal.”
The Who’s “Live At Leeds” album captured the ferocity of their “heavy” live sound, and Roger Daltrey was arguably the first rock vocalist to scream for his supper. Thee inspired bands such as Cream (”Tales of Brave Ulysses”), Led Zeppelin (”Heartbreaker”), Deep Purple (”Smoke On the Water”), Cactus (”Parchman Farm”, Mountain (”Mississippi Queen”).
Judas Priest probably was the first band to put all the elements of industrial-strength Heavy Metal together (testosterone-infused music, S&M-inspired leather and studs attire, banshee vocals).