Bob Newhart, the deadpan accountant-turned-comedian who became one of the most popular TV stars of his time after striking gold with a classic comedy album, has died at 94.

Jerry Digney, Newhart’s publicist, says the actor died Thursday in Los Angeles after a series of short illnesses.

Newhart, best remembered now as the star of two hit television shows of the 1970s and 1980s that bore his name, launched his career as a standup comic in the late 1950s. He gained nationwide fame when his routine was captured on vinyl in 1960 as “The Button-Down Mind of Bob Newhart,” which went on to win a Grammy Award as album of the year.

While other comedians of the time, including Lenny Bruce, Mort Sahl, Alan King, and Mike Nichols and Elaine May, frequently got laughs with their aggressive attacks on modern mores, Newhart was an anomaly. His outlook was modern, but he rarely raised his voice above a hesitant, almost stammering delivery. His only prop was a telephone, used to pretend to hold a conversation with someone on the other end of the line.

“You changed four score and seven to 87?” Newhart asks in disbelief. “Abe, that’s meant to be a grabber … It’s sort of like Mark Antony saying, ‘Friends, Romans, countrymen, I’ve got something I wanna tell you.’”

Another favorite was “Merchandising the Wright Brothers,” in which he tried to persuade the aviation pioneers to start an airline, although he acknowledged the distance of their maiden flight could limit them.