Sitcoms
1. WKRP in Cincinnati (CBS) 1978-1982 starring Gordon Jump, Howard Hesseman, Richard Sanders, Loni Anderson, Jan Smithers, Tim Reid, Frank Bonner, and Gary Sandy
2. Welcome Back, Kotter (ABC) 1975-1979 Starring John Travolta, Ron Palillo, Robert Hegyes, Lawrence Hilton-Jacobs, and Gabe Kaplan
3. Punky Brewster (NBC and first-run syndication) 1984-1988 starring Soleil Moon Frye and George Gaynes
4. Mork and Mindy (ABC) 1978-1982 starring Robin Williams in his first role and Pam Dawber
5. The Partridge Family (ABC) 1970-1974 starring Shirley Jones, David Cassidy, and Susan Dey
6. ALF (NBC) 1986-1990 starring Paul Fusco and Max Wright
7. Raising Hope (FOX) 2010-2014 starring Lucas Neff, Martha Plimpton, Garret Dillahunt, Shannon Woodward, and "introducing" Cloris Leachman
8. Man With a Plan (CBS) 2016-2020 starring Matt LeBlanc and Liza Snyder
9. Less Than Perfect (ABC) 2002-2006 starring Sara Rue
10. Caroline in the City (NBC) 1995-1999 starring Lea Thompson

Dramas
1. Early Edition (CBS) 1996-2000 starring Kyle Chandler and Shanesia Davis-Williams
2. Highway Patrol (first-run syndication) 1955-1959 starring Broderick Crawford, narrated by Art Gilmore
3. Scorpion (CBS) 2014-2018 starring Elyes Gabel and Katharine McPhee
4. Lincoln Heights (ABCFamily) 2007-2009 starring Russell Hornsby
5. Manifest (NBC and Netflix) 2018-2023 starring Melissa Roxburgh and Josh Dallas
6. Highway to Heaven (NBC) 1984-1988 starring Michael Landon and Victor French
7. The District (CBS) 2000-2004 starring Craig T. Nelson- CBS cancelling this was the final straw in scripted originals on Saturdays.
8. Knight Rider (NBC) 1982-1986 starring David Hasselhoff and William Daniels
9. -
10. -

Four seasons-Silver Spoons and five seasons ..counting syndication..1st run

I would be great if there was an easy way to find out all shows that were four seasons long.

The Top Ten List of 4 Season Sitcoms look complete in my eyes

WKRP in Cinn..and show came back later in syndication..for how many yrs ? All of cast didnt come back...

OpenAI/ChatGPT should be able to make lists like this in seconds one day.

These are some other sitcoms (or dramedies) which ran for four seasons:

The Stu Erwin Show / Trouble with Father (1950-1955)
My Little Margie (1952-1955)
Our Miss Brooks (1952-1956)
The Phil Silvers Show / Sergeant Bilko (1955-1959)
Dennis the Menace (1959-1963)
The Many Loves of Dobie Gillis (1959-1963)
The Joey Bishop Show (1961-1965)
McHale's Navy (1962-1966)
Chico and the Man (1974-1978)
Soap (1977-1981)
¿Qué Pasa, USA? (1977-1980)
Archie Bunker's Place (1979-1983)
Still the Beaver / The New Leave it to Beaver (1984-1985, 1986-1989)
Small Wonder (1985-1989)
It's Garry Shandling's Show (1986-1990)
Out of This World (1987-1991)
Dear John (1988-1992)
Doogie Howser, M.D. (1989-1993)
Major Dad (1989-1993)
Evening Shade (1990-1994)
Dave's World (1993-1997)
The John Larroquette Show (1993-1996)
Sweet Valley High (1994-1997)
Kenan & Kel (1996-2000)
Malcolm & Eddie (1996-2000)
Suddenly Susan (1996-2000)
The Hughleys (1998-2002)
Two Guys, a Girl and a Pizza Place / Two Guys and a Girl (1998-2001)
Half & Half (2002-2006)
Still Standing (2002-2006)
What I Like About You (2002-2006)
That's So Raven (2003-2007)
Drake & Josh (2004-2007)
Everybody Hates Chris (2005-2009)
Life with Derek (2005-2009)
My Name Is Earl (2005-2009)
Zoey 101 (2005-2008)
Hannah Montana (2006-2011)
'Til Death (2006-2010)
Wizards of Waverly Place (2007-2012)
Web Therapy (2008-2014)
Big Time Rush (2009-2013)
Eastbound & Down (2009-2013)
Good Luck Charlie (2010-2014)
Love That Girl! (2010-2014)
Melissa & Joey (2010-2015)
Victorious (2010-2013)
The Exes (2011-2015)
Jessie (2011-2015)
Kickin' It (2011-2015)
Wilfred (2011-2014)
Lab Rats (2012-2016)
Liv and Maddie (2013-2017)
The Thundermans (2013-2018)
Every Witch Way (2014-2015)
Mozart in the Jungle (2014-2018)
Nicky, Ricky, Dicky & Dawn (2014-2018)
Survivor's Remorse (2014-2017)
Life in Pieces (2015-2019)
Unbreakable Kimmy Schmidt (2015-2019)
Angie Tribeca (2016-2018)
The Detour (2016-2019)
The Good Place (2016-2020)
Brockmire (2017-2020)
One Day at a Time (Netflix/Pop) (2017-2020)
A.P. Bio (2018-2021)
The Last O.G. (2018-2021)

WKRP in Cinn..and show came back later in syndication..for how many yrs ? All of cast didnt come back...

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The Wild Wild West