No interest in seeing the top 4 so I can't comment on those, but Seinfeld, Simpsons, and Twilight Zone after that are all excellent picks.
Commenting on the shows out of the list that are among my personaly favourites-
Golden Girls - Happy to see it included anywhere in the list. My favourite sitcom of the '80s. I don't find any other show from this era very funny, but The Golden Girls is still hilarious.
Doctor Who - It had to be included, although personally I think the longest running scifi show of all time with over 800 episodes deserves to be ranked much higher. Not unexpected for an American list though.
TWD - Seems placed about right. Very popular current show that started off very strong and fresh, but it hasn't had the consistency to place higher.
30 Rock - Pleasantly surprised to see this ranked so high. An underrated and underappreciated show that I can watch repeatedly.
Star Trek - Great to see this top 20. Such a widespread impact on society beyond television.
Game of Thrones - I'm sure it will end up even higher in time, but it's too new to place it over the classics yet. I expect it will nab the top spot given a few years though. GoT stands alone.
The Twilight Zone - I'm amazed and thrilled to see this ranked so high. Movies and TV shows are still pillaging the show for ideas, it was that good. It still holds up very well today.
Simpsons - The golden era of The Simpsons is untouchable imo, and this show basically defined my generation. Shame that over the past ~15 years it's gone from the best animated show on TV to one of the worst.
Seinfeld - I don't actually need to say anything here. It's Seinfeld.
My favourite show isn't on the list, but I wasn't expecting it to be given the genre and lack of impact. Given how large a cross-section is covered, it actually seems like a pretty solid list overall though. No individual is going to find the entire list to their specific tastes when you're covering over 50 years, but most of these choices make sense.