Who are your favorite straight, non-goofy characters in a sitcom. Mine are:

1. Jerry Seinfeld (Seinfeld)
2. 99 (Get Smart)
3. A. C. Slater (Saved By The Bell)
4. Tommy Strong (Martin)
5. Uncle Phil (Fresh Prince)

I'd have to go with Jerry Seinfeld as himself, and also either of Bob Newhart's characters from his seventies and eighties sitcoms.

99 - didn't the group Toto do a song about her? :D

Fred Mertz (I Love Lucy)
Thurston Howell, III (Gilliagan's Island)
Mrs. Howell (Gilligan's Island)
Darren Stephens (Dick York) (Bewitched)
Alfred the Butler (Batman)
Aunt Harriet (Batman)
Ricky Ricardo (I Love Lucy)
Ward and June Cleaver (Leave it To Beaver)
Marilyn Munster (Munsters)
Mr. French (Family Affair)
Mary Tyler Moore (Mary Tyler Moore Show)
Fred McMurray (My Three Sons)
Jim Anderson (Father Knows Best)

Dave Nelson ("NewsRadio"/played by Dave Foley)

Florence Johnston (The Jeffersons) {gotta love her!}
Ricky Ricardo (I Love Lucy)
Fred Mertz (I Love Lucy)
Mary Richards (Mary Tyler Moore)
Anthony Nelson (I Dream of Jeannie)
Lily Munster (The Munsters)
Richie Cunningham (Happy Days)

These are the only ones that come into mind.

Janet Wood - "Three's Company"
Allie Lowell - "Kate and Allie"
Dr. Alex Stone - "The Donna Reed Show"

others too...

Originally posted by TVAdam
Dave Nelson ("NewsRadio"/played by Dave Foley)

Ditto.

I also love Joe Hackett from Wings.

Wilbur Post ~~ Mister Ed

Hayden Fox ~~ Coach

Jerry Seinfeld ~~ Seinfeld

Bob Hartley- The Bob Newhart Show

Dick Louden- Newhart

In other words......................Bob Newhart!:happyface