The 80s and 90s had Must See branded blocks on NBC anchored by The Cosby Show and Cheers in the 80s, and Friends and Seinfeld in the 90s. But they have had several other comedies on Thursdays in the decades before and after as well. If your favorite isn't on the list, it is probably a midseason show that I missed and wasn't aware of, that is what the other option is for. Although some of NBC's most popular comedies in syndication like The Facts of Life, I Dream of Jeannie, and The Golden Girls never aired on Thursdays but were elsewhere during the week.

I was too young to see this lineup live, but my favorite of any season was 1993-1994, when Mad About You, Wings, Seinfeld, and season 1 of Frasier aired back-to-back.

the shows I voted for in order of preference
1. Frasier
2. Mad About You
3. Family Ties
4. Wings
5. Bachelor Father
6. Seinfeld
7. Night Court
8. Diff'rent Strokes
9. Hazel
10. Cheers
11. The Cosby Show
12. Caroline in the City
13. Welcome to the Family
14. The Paul Reiser Show

Are these shows you just remember being on Thursdays, or did you do some sort of search?I have the complete primetime directory that has every fall lineup through 2006, and epguides.com has the fall lineups for the more recent years.

Friends
Seinfeld
Harper Valley PTA
The Cosby Show
Different Strokes
A Different World
Family Ties
Hazel
Cheers

Friends
Seinfeld
Frasier
Cheers
Wings
Mama's Family
Family Ties
Night Court

There's a few others on the list that I liked back in the day, but these are the ones that have stood the test of time.