Juggler; hmmm no

Mime? Do you mean a mimic skill like GoGo in FFIII? otherwise no

Blue Mage; is still a a mage class so DPS?

Orator; yay lets talk to enemies to death...no

Time Mage; a mage never the less as a support type class. Their spells have been known in Whm and Sum so why not just add those spells instead?

Chemist; is a DoH already, how would it become a forth class?

Now if they were strictly support with no DPS/Tank/Healing attributes I might buy that. Either way you look at it it would fall under the three main roles for the most part.