I agree with you about Dr. Elby´s relevant role in the golden era of "Dallas" and how he helped the show understand what a sensitive, loving woman Sue Ellen was, behind her (very messy and boozy) behavior.
I found a little more info about him here:
"Jeff Cooper, a Hamilton-born actor who had success in Hollywood and is probably best known for his role as Sue Ellen Ewing's psychiatrist on the 1980s TV hit "Dallas," died quietly in his hometown at the end of March.
A small death notice appeared in The Spectator on April 7 announcing his passing on March 24, but it made no mention of his decades-long career in Tinsel Town.
That cavalcade before the cameras included roles in movies with David Niven, James Garner, Sydney Poitier and David Carradine, as well as appearances in such shows as "Perry Mason," "The Alfred Hitchcock Hour," "The Virginian," "The Love Boat," "Wonder Woman," "Knight Rider," "Vegas" and "The Fall Guy."
His wife, Colette, said he had become "a private person" since he came back to Hamilton from Hollywood in 1995 to look after his ailing mother Elizabeth.
She, however, communicated his death to friends in California like actors Keith and Robert Carradine.
Cooper, who was 82 when he died, spent his years back in Hamilton learning how to play guitar, taking nature walks, working out at the downtown YMCA, telling stories of his Hollywood days and visiting the library.
"He was a voracious reader," said his wife, a well-known realtor.
"If he wasn't playing his guitar, he had 10 books from the library he was reading."
She also said he was a very meticulous. "I never seen anyone shine their shoes so much," she said.
"He shined them even if he was just going to the Y. I guess that was part of his Hollywood days."
Source:
https://www.thespec.com/news-story/...nown-for-role-as-psychiatrist-in-tv-s-dallas/