Eli Wallach, who was one of his generation’s most prominent and prolific character actors in film, onstage and on television for more than 60 years, died on Tuesday at his home in Manhattan. He was 98.

His death was confirmed by his daughter Katherine.

A self-styled journeyman actor, the versatile Mr. Wallach appeared in scores of roles, often with his wife, Anne Jackson. No matter the part, he always seemed at ease and in control, whether playing a Mexican bandit in the 1960 western “The Magnificent Seven,” a bumbling clerk in Ionesco’s allegorical play “Rhinoceros,” a henpecked French general in Jean Anouilh’s “Waltz of the Toreadors,” Clark Gable’s sidekick in “The Misfits” or a Mafia don in “The Godfather: Part III.”

Despite his many years of film work, some of it critically acclaimed, Mr. Wallach was never nominated for an Academy Award. But in November 2010, less than a month before his 95th birthday, the Academy of Motion Picture Arts and Sciences awarded him an honorary Oscar, saluting him as “the quintessential chameleon, effortlessly inhabiting a wide range of characters, while putting his inimitable stamp on every role.”

His first love was the stage. Mr. Wallach and Ms. Jackson became one of the best-known acting couples in the American theater. But films, even less than stellar ones, helped pay the bills. “For actors, movies are a means to an end,” Mr. Wallach said in an interview with The New York Times in 1973. “I go and get on a horse in Spain for 10 weeks, and I have enough cushion to come back and do a play.”