Lillie's the only one who's truly "completed" her goal if we're getting really technical here.
I mean is there an end goal for being a doctor? Also, Iris being champion is not her true goal, her true goal is being a dragon master which imo she ain't there yet.
I know people might disagree with this, but i'd like to see Chloe one more time, because there's still a part of me that feels that her Eevee's not done, sure we know that Chloe has decided to let Eevee choose her own path, but we still don't know if being capable of Gigantamaxing is what's causing it to not evolve or not, because if it is....then her Eevee can not choose a future other than staying eevee due to being incapable of evolving unless it's fed the Max Soup to take away the G-max power, granted it would feel kind of stupid to me at the same time if that was why it couldn't evolve, but it's better to confirm why Eevee can't evolve outright, than leave it hanging.
Of course i've been thinking of something else, but i'm gonna discuss that in another thread.