Don’t forget Tahnee Welch (currently 48) or Barret Oliver (37); both have apparently stopped acting, though.
With the exception of James Earl Jones, everyone from Dr. Strangelove or How I Stopped Worrying and Learned to Love the Bomb has been dead for at least 10 years.
Hogan’s Heroes ended in 1971. I think all the main cast is dead except Newkirk (Richard Dawson).
Conan had Werner Klemperer (Klink) on his show a few times. Klink died in 2000.
Robert Crane was murdered. John Banner (Schultz) died in 1973 riot long after the show ended.
Larry Hovis (Carter) died in 2003. Leon Askin (General Burkhalter) in 2005. Ivan Dixon (Kinch) is dead 2008.
Robert Clary (Corporal Louis LeBeau is still alive. Which is doubly remarkable because as a French Jew, he was a prisoner of the Buchenwald concentration camp and the only one of 13 family members to survive
One thing I just realized about “Hogan’s Heroes” is the casting. Lots of war movies/shows (Great Escape, Rat Patrol) are criticized for having Americans in non-American roles. But HH had Americans Crane, Hovis, Dixon and Washington as Americans, Dawson is British, Clary is French and the Germans were played by real-life Germans/Austrians Banner, Klemperer and Askin (although all three were Jewish). Howard Caine (Major Hochstetter was from Tennessee and of the two Helgas, one was Latvian, the other American.
One thing I’m finding as I investigate the living status of casts from movies I think ought to fit the criteria is that there’s always one or two survivors whose ages at the time were young enough to have survived the older cast members’ life spans.
The Rat Pack’s movies are a case in point. There’s always a younger female (which seems to be true of the general case I’m describing) who outlives Frank and Dean and Sammy et al.
George Kennedy is the main holdout from Charade (1963) and others of that era.
As far as I’m personally concerned in this thread it could add to the thrill of the hunt to find other such situations where one (two at most) survivor(s) are the feature attraction.
For a good case in point, think of the movies/shows where Clint Eastwood is the sole survivor (or nearly so).
Others like Clint would be fun to identify.
According to IMDb, Brian Dennehy is still alive. Born in 1938, so he may have a few years left in him.
Well, you know the Hollywood jury movie cliché: there’s always one holdout! 
Five of the Six Main actors/actresses (appearing in 10+ episodes) from The Golden Girls are dead (including Stan Zbornak and Miles Webber).
Forgot about Miles, I was thinking of this last night!
Or The Professionals (1966) - Burt Lancaster, Lee Marvin, Robert Ryan, Woody Strode, Jack Palance, and Ralph Bellamy are all dead but Claudia Cardinale is still alive.
And also Jewish, born Howard Cohen.
Bewitched ended in 1972. None of the stars from the first few seasons are still alive and of the latter seasons only the twins who played Tabitha and Adam are still alive. Bernard Fox (Dr. Bombay) who appeared in 23 of the 254 episodes is the closest to an adult cast member still around and he was never a regular; Samantha, both Darrins, Endora, Larry Tate, Uncle Arthur, Esmerelda, Louise Tate, Abner Kravitz, both Gladys Kravitzes, and others are all long dead.
And also an award winning banjo enthusiast. No, really.
I know some people who knew him (theater professors) and they claim he and his wife were wonderful if nutty people (nutty in the Auntie Mame sense, not Randy & Evi Quaid). He made most of his money as a dialect coach and acting instructor but made some good investments with inherited money so he was very well to do and used to love to play banjo on the flat roof of his house. He and his wife were both very big into New Age movements (crystals, past life regression, etc.).
I loved him in 1776 of course: “New York abstains. Courteously.”
Deleted, didn’t see Sampiro’s post.
She was 78 fourteen years earlier, when the film was made. 
And Betty White, the one left alive, is the oldest of the lot (albeit only by a couple months - she was born mid-January 1922, Bea Arthur in mid-May)…
ok, here’s another one.
Chico and the Man main cast Freddie Prinze, Jack Albertson, Scatman Crothers
was on from 1974-1978
show died when the star (Prinze) blew his brains out. He had played Russian Roulette for years. Luck ran out when he was 22
Albertson died in 1981 (at age 71)
Scatman Crothers died in 1986 age 76
I haven’t seen this show in 25 years. IIRC there wasn’t any recurring characters.
They tried replacing Freddie Prinze with a kid. But, the show quickly got canceled.
I used to watch this show in reruns back during the 80’s.
And he came and gave a talk at my high school in 1991! Dangerous place, that. Not relatively, of course.
-Joe