Your favorite oddball character on sitcoms?

I notice a lot of sitcoms have an oddball character and was wondering if you have a favorite? This would be a follow up question to the one I asked about the favorite sitcom wife.

For example: (You may or may not agree with me)
King of The Hill-Dale
Home Improvement-Wilson
King of Queens-Arthur
Wings-Lowell
Family Matters-Urkel
The Simpsons-Ned
South Park-not really sure but I’m guessing Butters

For me, it’s Kramer on Seinfeld.