they are the main trio whatever you like it or not, and zoro personal goal is stricly speaking only aim to become the strongest (so gain power, becoming stronger):
Nami role is still super important
@AverageNamiEnjoyer
Pirate king aint just made up by 1 individual but it is a group that will guide him there and luffy will be the most famous one, so fame is what will be remeber about monkey d luffy while zoro will be remeber about his future clash with mihawk and nami about the future treasures