Various, Black Sabbath, Deep Purple, April Wine, Nazareth, Golden Earring, Jethro Tull, Blue Öyster Cult, Rainbow, Gary Moore, Magnum, Europe, Scorpions

Seattle Grunge

Heavy riffs played by people raised on punk, recorded cheap in the Pacific Northwest and then sold worldwide.

Detroit Proto-Punk

Pull this thread and you get Michigan guitar noise from 1969 ballrooms to 1999 basements, unbroken.