Not that I think bands should be put entirely into certain genres, but I'd classify stuff like the Ramones, Sex Pistols, the Damned, Buzzcocks, early Clash as punk, mostly because of the tempo of a lot of the music. Talking Heads, Blondie, Devo, etc. were what I would consider new wave, though in the 80's I remember kids calling everything from early INXS to New Order to later Husker Du new wave. Music became more poppy, more fun, more danceable.