Donald Barton, who made his mark as a leading Broadway and Off Broadway performer, died April 24 at his home on Long Island of complications from heart surgery. He was 76.

The striking, 6-foot-3 actor studied at the U. of Texas drama school and soon after debuted on Broadway in “Design for a Stained Glass Window” with Charlton Heston.

His early stints in musical comedy later gave way to an increasing reputation for serious drama, including the Broadway revival of “Much Ado About Nothing” with John Gielgud and “Deathtrap.”

Barton spent six summer seasons leading the Playhouse-on-the-Green repetory group in Columbus, Ohio, where he received critical acclaim for his starring turns in “Who’s Afraid of Virginia Woolf?” and “Lion in Winter.”

He later made a strong impression on television, where his stage performance in “The Royal Family” quickly became a classic addition to the “Great Performances” series, and he enjoyed a running part as banker on “As the World Turns.”

He is survived by a nephew.