My son has never heard of him. Nor Malcolm Jamal Warner.
The problem with the "deaths in threes" is that by the time you hit middle age, we commit so many celebrities to memory. We think of them as big stars because they impacted our childhood. Well, guess what? As we get older, those celebs are going to start dying in spades.
Saying that celebs die in threes is like talking about how nursing home residents die in numbers. Yeah, that's what nursing home residents do.
Do twenty somethings have any idea who Shelley Long is? Not many. But I'd bet you'd post something if and when she died. Kelsey Grammar had a career after Cheers, but I doubt my son has anything but the most passing familiarity with him and certainly doesn't give a shit. I know he knows Ozzy but I doubt his Taylor Swift and hip-hop listening gf does, or would remotely care.
I watched Chips when I was young. I liked Erik Estrada. He's a celeb to me. But I doubt my younger brother has any idea who he is.