Does anyone know which episodes were the last to feature each of these players?

Bentley- I never saw the very last episode so I don't know if he was in it or not

Mother Jefferson

Damon Evans

Marcus

Leroy- I don't think he appeared in any shows after year 5 although he is mentioned in the one where George is committed to the mental hospital

Jay Hammer

Ralph the Doorman

Damon Evans' was 78. Lionel Gets the Business 14-Jan-1978

Zara Cully's was 70. The Last Leaf 12-Nov-1977

Jay Hammer's was 110. Louise's Convention 11-Apr-1979

I think Bentley was in the last episode I think and the rest I'm not sure of their final appearences.

Thanks. I'm guessing Paul Benedict was in the last episode, but I never saw it so I don't know.