Yah this is a nice question and I certainly agree that lord Jashin can be a Otsutsuki king
although there are very miniscule indications for that but let’s see this in some detail
I agree as far as the otsutsuki king stuff is concerned that there is some hierarchy but I doubt if they could have some imperialism in there,
But I doubt if they could have some imperialism in there,
I believe it would be too human and these aren’t humans so we shouldn’t treat them in such away.
To give another perspective think of it this way that the otsutsuki are
the predators and the humans are prey for those predators. They are heartless and humans are nothing but food for them.
So even if I say that these monsters will not work in a society with a king
and eventually, they would end up killing each other. It means that the king has to be massively stronger than what they actually are.
Anyways this is what I believe and we have seen from the perspective of every otsutsuki
and the possibility of Jashin being an otsutsuki is very low.