Seinfeld is the only one I watch to this day if it is on and it stands above the rest IMO. That said I lived for sitcoms of the 80s and 90s. I enjoyed The Cosby Show, Roseanne, Fresh Prince, Cheers, Wings, King Of Queens, Night Court, Everybody Loves Raymond and Family Ties and Taxi, and even Blossom. I hated Friends while it was on but now I don't really care either way about it.
I watched a lot of Coach and Family Matters in the 90s, looking back though it's hard to watch Family Matters. And Full House really was an awful show.