I suspect “Groober” is probably deceased as he was one of the older crewmen. Fuji might still be alive.
Gruber (Carl Ballantine) actually only died a few short years ago. He lived to a good old age. The guy who played Virgil died about a year ago or so, as did Borgnine himself.
I guess the only ones from the show still surviving are Tim Conway, the guy who played Fugi, Gavin MacLeod, and the hillbilly character Willy (who was the real-life son of husband-wife country superstars Kitty Wells and Johnny Wright, if memory serves me).