What band did its singer wear his trademarked oversize glasses?

The band whose singer wore trademark oversized glasses was Elvis Costello and the Attractions. Elvis Costello was the stage name of English singer-songwriter Declan Patrick MacManus, and his large black frames became one of his most recognizable visual trademarks.

Costello emerged in the late 1970s during the British punk and new wave era. His debut album, My Aim Is True, appeared in 1977, and his striking look—Buddy Holly-style glasses, dark clothing, and a sharp, tightly controlled stage persona—helped distinguish him from other performers. The glasses were more than a fashion prop: Costello has said he had worn glasses since adolescence because of astigmatism.

The Attractions were his principal backing band, featuring Steve Nieve on keyboards, Bruce Thomas on bass, and Pete Thomas on drums. Together they recorded influential albums including This Year’s Model, Armed Forces, and Trust. Costello’s glasses are sometimes confused with Elvis Presley’s sunglasses, but the oversized black frames in this question refer to Elvis Costello.