David Spade should get some mention.
Saturday Night Live 72 episodes
Just Shoot Me 149 episodes
8 Simple Rules 39 episodes
Rules of Engagement 100 episodes
Many other TV and film projects, and his career isn’t over.
Notably he was a standout performer in Just Shoot Me and Rules of Engagement among very strong casts.
Harry Morgan
December Bride, 156 episodes
Pete and Gladys, 72 episodes (spinoff from December Bride)
Kentucky Jones, 7 episodes
Dragnet 1967, 98 episodes
Hec Ramsey, 8 episodes
MASH, 180 episodes
After MASH, 30 episodes
Blacke’s Magic, 12 episodes
Third Rock From The Sun, 3 episodes
ETA: I see Reality Chuck already mentioned him, on review.
Jack Klugman. Five seasons as Oscar Madison on The Odd Couple and seven seasons as Quincy, M.E. plus numerous guest starring roles on other shows.
Wendie Malick. She’s been all over TV since the early 80’s. Mostly sit-coms, but also a lot of commercials. Among her 136 acting credits:
Trauma Center: 13 episodes
Dream On: 119 episodes
Just Shoot Me: 149 episodes
Fillmore: 16 episodes
Frasier: 10 episodes
Jake in Progress: 21 episodes
Big Day: 12 episodes
Hot in Cleveland: 125 episodes
Rush Hour: 13 episodes
Cripes, I forgot Waterson.
16 Seasons on Law and Order was enough to get him on the list. Throw in 3 seasons of Newsroom and 3 of Frankie and Grace…
And 2 seasons of the underrated I’ll Fly Away
She also got the play Gayle, ex-wife of The Hoff on “Baywatch” for 7 episodes.