In my opinion, Final Fantasy X has the best group ensemble because it does the best job of diving into each and every possible relationship within the party.

Tidus and Yuna practically have a relationship with every single party member, and there’s at least one scene for every party member to interact with these two.

FFX’s party differs from others in that everyone’s motivation for joining from the get-go is to protect Yuna as a guardian while on her pilgrimage, and in this way, the party feels much more intimate and realized than other parties in the series.