For sitcom watchers of the 1980s, he was Clayton Runnymede Endicott III, the hopelessly highbrow chief of staff at a governor's mansion on "Benson,'' the ABC series whose title character was a butler played by Robert Guillaume.
And for sci-fi fans of the 1990s and convention-goers ever since, he was Odo, the shape-shifting Changeling and head of space-station security on "Star Trek: Deep Space Nine.''
"I am all of those characters, and I love that,'' Auberjonois said in a 2011 interview with the "Star Trek'' website. "I also run into people, and they think I'm their cousin or their dry cleaner. I love that, too.''
Auberjonois was born in New York in 1940, the son of Fernand Auberjonois, Swiss-born foreign correspondent for US newspapers, and the grandson of a Swiss post-impressionist painter also named Rene Auberjonois.
The younger Rene Auberjonois was raised in New York, Paris, and London, and for a time lived with his family in an artists' colony in Rockland County, New York, whose residents included the actors John Houseman, Helen Hayes and Burgess Meredith.
After graduating from college at Pittsburgh's Carnegie Institute of Technology, now Carnegie Mellon, Auberjonois hopped around the country joining theater companies, eventually landing three roles on Broadway in 1968, including playing the Fool in a long-running version of King Lear.
The following year he would play Sebastian Baye opposite Katharine Hepburn in "Coco,'' a play on the life of designer Coco Chanel that would earn him a Tony for best actor in a leading role in a musical.
He would later see Tony nominations for 1973's "The Good Doctor,'' 1984's "Big River,'' and 1989's "City of Angels.''
In 1970, Auberjonois began his run with Altman, playing Mulcahy in "M.A.S.H.''
In his most famous exchange from the movie, Sally Kellerman's Margaret Houlihan wonders how such a degenerate doctor as Donald Sutherland's Hawkeye Pierce could reach a position of responsibility in the US Army.
A bible-reading Auberjonois responds, deadpan: "He was drafted.''
"I actually made that line up when we were rehearsing the scene,'' Auberjonois said on the podcast "The Gist'' in 2016. "And it became a kind of an iconic line for the whole film.''
The same year he played an off-the-wall ornithologist in Altman's "Brewster McCloud,'' played a saloonkeeper alongside Warren Beatty in the director's western "McCabe & Mrs. Miller'' in 1971 and appeared in Altman's "Images'' in 1972.
He spent much of the rest of the 1970s doing guest spots on TV shows before joining the cast of "Benson'' in its second season in 1980, where he would remain for the rest of the show's seven seasons, playing the patrician political adviser and chronic hypochondriac Endicott.
Much of his later career was spent doing voices for animation, most memorably as the French chef who sings the love song to fish-killing "Les Poissons'' in Disney's 1989 "The Little Mermaid.''
He played Odo on "Deep Space Nine'' from 1993 until 1998 and became a regular at "Star Trek'' conventions, where he raised money for Doctors Without Borders and signed autographs with a drawing of Odo's bucket, where the character would store himself when he returned to his natural gelatinous state.
Auberjonois was also a regular on the ABC law-firm dramedy "Boston Legal'' from 2004 to 2008.
Late in his career, Auberjonois would work with independent filmmakers including the artful director Kelly Reichardt, for whom he appeared in 2016's "Certain Women'' and 2019's "First Cow,'' his final role.
In addition to his son, he is survived by his wife of 56 years, writer Judith Auberjonois; sisters Marie-Laure Degener and Anne Auberjonois; daughter Tessa Auberjonois; son-in-law Adrian Latourelle, daughter-in-law Kate Nowlin and three grandchildren. (AP)