I don't mean to get very morbid but we have to face reality about how tragically odd this became in such a short period of time: Dolph Sweet (Gimmie a Break), Selma Diamond and Florence Halop (Night Court), Nicholas Colasanto (Cheers), and two voice actors from The Gummi Bears (Bill Scott and Roger C. Carmel).

I don't mean to get very morbid but we have to face reality about how tragically odd this became in such a short period of time: Dolph Sweet (Gimmie a Break), Selma Diamond and Florence Halop (Night Court), Nicholas Colasanto ([i]Cheers), and two voice actors from The Gummi Bears (Bill Scott and Roger C. Carmel).
I'm sure smoking had something to do with it in some cases.

Cancer x3
Heart Attack x2
Heart Disease x1

Bad luck, but I do not think anything sinister was going on.

ive often thought that it was a little odd myself

Smoking really ended a lot of people's lives much too soon back in the day.

Maybe cancer or heart problems.