I have often used names from The Flintstones. Fred Flintstone, Barney Rubble, Mr Slate, etc.
I like them because they are clearly not real names, and yet they don’t come across like joke names (Superman, Bugs Bunny, etc.) either. Plus the characters have the kinds of relationships that exist in real life and work (spouse, boss, child, pet, neighbour, club member, etc.), so if the thing you are describing involves those kinds of relationships, they work for that too. Also, there is a large enough cast to provide enough names for most purposes.
And even if the reader does not recognize the reference, the names still work well enough and are very unlikely to accidentally coincide with the names or real people.
Hope this helps,