Thing's aren't looking too good on the variety front

Black Mage-Have it
White Mage-Have it
Red Mage-Planned
Warrior-Have it
Thief-Rolled into Ninja/Rogue
Monk-Have it
Knight-Have it
Ninja -Have it
Dark Knight-Coming
Dragoon-Have it
Geomancer-Rolled into White Mage
Blue Mage-BLU WHEN YOSHI
Time Mage-Most of their skills already in game, Yoshi said we'll never get any speed skills like haste
Berserker-Rolled into Warrior
Mystic Knight- WHEN YOSHI
Beast Master-No comment, don't know about this class
Dancer-Supposedly planned
Samurai-Coming(?)
Chemist-Have it
Engineer/Machinist-Cid is it
Gambler-WHEN YOSHI
Artist-No comment
Gunner-Coming
Puppetmaster-No comment (Isn't this similar to Beast/Summoner)
Corsair-No comment
Rune Fencer-Most likely folded into Mystic Knight