I'm going with Vivi, Steiner, Freya, and Amarant.

Dagger has to be the worst summoner in the series and she's a terrible White Mage. Eiko is a better white mage and her summons are more useful but she quickly gets made obsolete due to the customization system and Quina.

Zidane bugs me... He sufferes from Locke syndrome where he's obviously a specific class but the Gaming gods have decided he needs to have main character status which throws the conventions of his class out the window. Now how is my thief capable of out damaging my Knight and Dragoon with a knife again? Ignoring that minor gripe, I actually don't really use Zidane as a damage dealer cause he's too busy stealing for me. Even with a maxed out Thievery and one of the most broken Trances, they get in the way more than help cause I need those precious items for my collection dammit!

Quina is awesome and she's one of my fave classes but she's still not as overwhelmingly overpowered or useful as my Blue Mages from FFV-VII. Not to mention they nerfed White Wind and Mighty Guard in this game. She's awesome but my four choices are just a tad bit more useful for me. Though it was a tough choice between her and Amarant.