Greatest Heavy Metal Band Ever

uhhh damn this is hard this is one genre i can sit down and discuss for hours over

i'm considering the gods and creators such as

judas priest
black sabbath
iron maiden

these bands made metal what it is today but well i gotta say sabbath they invented the genre when they played lower guitar tones because Iommi(i think it was iommi) lost two of his finger tips at his aluminum mill and made his own plastic and leather replacements that hurt too play when tunes tight so they detuned it too that lower darker pitch and that too me that is the birth story of metal

Good Points

SOAD
Judas Priest
Iron Maiden
Megadeth

Black Sabbath