Various, KC & The Sunshine Band, Jefferson Starship, Silver Convention, Henry Gross, The Four Seasons, Melissa Manchester, Kiss, Gwen McCrae, Rick Dees, Barry Manilow, Donna Summer, Pilot, Gladys Knight, Carol Douglas, Andrea True Connection, ABBA

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.