Robert Alan Morse

https://en.wikipedia.org/wiki/Robert_Morse#Personal_life_and_death

Robert Alan Morse (May 18, 1931 – April 20, 2022) was an American actor, who starred in How to Succeed in Business Without Really Trying, both the 1961 original Broadway production, for which he won a Tony Award, and its 1967 film adaptation; and as Bertram Cooper in the critically acclaimed AMC dramatic series Mad Men (2007–2015).[1][2][3][4] He won his second Tony Award for playing Truman Capote in the 1989 production of the one-man play Tru. He reprised his role of Capote in an airing of the play for American Playhouse in 1992, winning him a Primetime Emmy Award.