That cast of the early Cheers years until Shelley Long left the show was probably the best cast of characters of any sitcom. It was similar to Taxi which makes sense since it was the same creators as Cheers. Norm, Cliff, Coach, Carla, Diane & Frasier were incredible characters. They were all well developed characters not merely cut-outs for a momentary joke. The only other shows I can think of that came close was The Mary Tyler Moore Show & maybe Soap.
ROGER NICHOLS----SONGWRITER----WE'VE ONLY JUST BEGUN----RAINY DAYS AND MONDAYS----OUT IN THE COUNTRY----TIMES OF YOUR LIFE----I WON'T LAST A DAY WITHOUT YOU----AGE 84 https://en.wikipedia.org/wiki/Roger_Nichols_(songwriter)
PHIL ROBERTSON----DUCK COMMANDER----DUCK DYNASTY----AGE 79 https://en.wikipedia.org/wiki/Phil_Robertson
RICK DERRINGER----THE MCCOYS----ROCK AND ROLL HOOCHIE KOO----AGE 77 https://en.wikipedia.org/wiki/Rick_Derringer