Scott Walker, a singer-songwriter who became a 1960s pop sensation as the leader of the Walker Brothers, then turned toward dark and moody avant-garde compositions as a solo artist, died March 22 in London. He was 76.

His record company, 4AD, announced the death but did not say precisely where or how he died.

Mr. Walker was a session bassist before he rose to fame with the Walker Brothers, an easy-listening pop trio that topped the charts in Britain and reached the Top 40 in the United States. Their 1960s hits included “Make It Easy on Yourself,” written by Burt Bacharach and Hal David, and “The Sun Ain’t Gonna Shine Anymore,” by Bob Crewe and Bob Gaudio.

Although the group was based in England, Mr. Walker and his bandmates, who went by John Walker and Gary Walker, were American. They were also neither siblings nor Walkers, a last name they adopted around the time they moved to Britain in 1965.

Mr. Walker struck out on his own in 1967, releasing the first of four solo albums in three years, all titled “Scott.” Thickly orchestrated and often haunting, the records initially featured covers of songs by Jacques Brel, the Belgian chanteur, before comprising originals by the baritone-voiced Mr. Walker.

His fourth album, “Scott 4” (1969), sold relatively few copies but has since acquired the status of a cult classic, combining lyrics about “the neo-Stalinist regime” and Ingmar Bergman’s film “The Seventh Seal” with arrangements that echoed the soundtracks of Western film composer Ennio Morricone.

Mr. Walker was cited as an influence by musicians including Thom Yorke of Radiohead, Jarvis Cocker of Pulp, and David Bowie, who served as executive producer of the 2006 documentary “Scott Walker: 30 Century Man.”

Notable deaths in 2019: Elijah Cummings, Cokie Roberts, Toni Morrison and others we have lost this year

Don Imus | Don Imus, who spent more than half a century in radio and television skating along the edge of propriety and occasionally falling into the abyss of the unacceptable, died Dec. 27 at a hospital in College Station, Tex. He was 79. In a roller-coaster career in which he grew chummy with prominent politicians, repeatedly got suspended or fired for offensive cracks, abused drugs and touted health foods, Mr. Imus won a loyal following, made millions and transformed himself from a bad-boy DJ into a host whose program became a nearly mandatory stop for presidential candidates. Read the obituary (Richard Drew/AP)

Noel Scott Engel was born in Hamilton, Ohio, on Jan. 9, 1943. He changed his name after joining the Walker Brothers, which reunited for several albums in the late 1970s.

Mr. Walker later worked as a producer of songs and movie scores, and released solo records such as “Climate of Hunter” (1984), “Tilt” (1995) and “Bish Bosch” (2012).

“Walker’s latter-day albums are fearless and violent, featuring wailing donkeys, moans, scrapes, and famously, the sound of someone punching meat,” Pitchfork reviewer Mike Powell wrote in 2013. “They seem to have been written in another language entirely.”

Survivors include his partner, Beverly; a daughter, Lee; and a granddaughter, according to 4AD.