the loud gothic witch

Well, that’s the “working class” side of things.

You make a convincing case, though – there’s nothing ambiguous about the Munsters, @prokopetz was correct: despite the apparent similarities, they really are “something else entirely” than the Addamses.

That said, a crossover could be entertaining. Gomez (who has no class consciousness whatsoever) would decide that Herman is his New Best Friend, while Herman (who DOES, but in that “I am Solidly Middle Class and that is where I belong” way) would find Gomez’s eternal enthusiasm, frivolous hobbies, and casually throwing around money to be grating. (This is, of course, the Obnoxious Neighbor trope that’s a pillar of sitcom humor.)

Morticia and Lily would get along acceptably, though Lily might find Morticia a bit cold and possibly interpret that as “snobbish.”