Discuss a hypothetical 4th Role Class.

[Kaliesto]

Personally I always wondered what else could be done besides the traditional Fighter(DPS),Tank, and Healer classes. Personally this is kind of tricky because a lot of past final fantasy classes would fall under all three roles, and there is only a few classes that would be the odd ones out of the bunch.

Juggler, Mime, Blue Mage, Orator, Time Mage, Chemist.

Though maybe Time Mage might lean more toward being a Magical-Ranged DPS, Chemist would maybe technically be a jack of all trades but master of none, and Blue Mage might lean toward being a DPS class but the way they would have to get their abilities would be a unique thing only for this class.

Besides what is known officially, what type of idea would you have in mind to be a 4th role class? Any particular inspiration from other MMOs or your own personal idea?