Soundgarden made a place for heavy metal in alternative rock. Their fellow Seattle rockers Green River may have spearheaded the grunge sound, but they relied on noise rock in the vein of the Stooges. Similarly, Jane's Addiction were too fascinated with prog rock and performance art to appeal to a wide array of metal fans. Soundgarden, however, developed directly out of the grandiose blues-rock of Led Zeppelin and the sludgy, slow riffs of Black Sabbath. Which isn't to say they were a straight-ahead metal band. Soundgarden borrowed the D.I.Y. aesthetics of punk, melding their g...