Cloud (VII) - leader
Yuna (X) - summoner/white mage
Orlandu (Tactics) - swordsman
Quina (IX) - blue mage
Terra (VI) - black mage
Kain (IV) - dragoon
Ninja (I) - ninja
Faris (V) - thief/dancer

Everything you need. Well, a monk would be nice but we can only have 8. Otherwise, include Josef (II) in there.