Under the Radar 70s UK punk.....

Avengers, The Banned, The Boomtown Rats, Bow Wow Wow, Buzzcocks, Dead Boys, Dr. Feelgood, E-Boys, Eddie and the Hot Rods, The Flamin' Groovies, The Flying Lizards, Graham Parker, Ian Dury, The Jam, Magazine, Mink Deville, the Modern Lovers, Nick Lowe, Penetration,The Pop Group, PIL,the Rezillos, the Ruts, The Saints, Sham 69, Souxsie and the Banshees, Spizzenegri, The Stranglers, Tom Robinson, Ultavox,Undertones, Vibrators, Vic Godard

Undertones,buzzcocks,the dammed

They may not have been under the radar - but Stiff Little Fingers (Ireland) is a must hear imho...

the vibrators "pure mania" might be the great lost punk album of the 70s; also check out the adverts "crossing the red sea" and stiff little fingers, who were very clash-like. i haven't heard the slits in probably 30 years--my recollection was they couldn't play their instruments, in a cool sort of way.

maybe post punk, but dig the au pairs, gang of four, the fall, 999, and lots more...