As far as out cartoon characters? hmmm. There are not many. Waylan Smithers comes pretty close. I think Bugs Bunny is not only a drag queen but bisexual. He always dresses up as a girl and kisses the male villains. I can think of one specific example where he is “Miss Scarlet” and Yosemite Sam is chasing after him. However, Bugs’s true sexuality I think is asexuality because afterall he is a cartoon and the issue is never really brought to light as it is with Waylan.
I do remember some instances in All in the Family, but I can not think who it was or why he was there. I think Bentley in the Jeffersons was also gay. What about Monroe from “Too Close for Comfort”? I believe his sexuality was brought up once when the two girls tried to rape him; although, I can not remember the specifics with this one. I think he was more confused than gay though.