I think it's ironic how King is named King, when he has never shown any desire to pass/challenge Kaido, where-as Zoro actively tries to match Luffy, and Queen is named Queen, when he treats women horribly, while Sanji treats them like... well, queens. Oda's naming schemes are always a lot of fun to read into, IMO, even moreso if you actually know Japanese (I'm not great with it).