Assume perfect distribution of a token. What proof protocol is the fastest?

Tron is taking off because of it's SR system. It's super centralized. I don't think it will stand the test of time, but it will make a lot of people rich for now.
Centralization is a huge fear with Proof of stake. Even proof of work.
But let's assume that we could actually not worry about centralization. Let's assume that the token we're using the stake the network is very decentralized and will always be.
What would be the ideal protocol to run on top of it? I think it'd have to be some form of proof of stake, because obviously a token is involved.
There is DPoS. Like tron. but is there a more sophisticated version?
Is there a list of PoS network approaches that I can look at?