Lore: What are the richest families in The Sims?

In older versions of the game, the Worthingtons were a canonically wealthy family (rivals to the Landgraabs). I believe there was one premade Worthington in TS2 (a university student), but mostly they showed up as lore/in chance cards/maybe some building names? Anyway, they didn't show up in TS3 or so far in TS4, but I always add some Worthingtons to my game to my game to be frenemies of the Landgraabs.