Rune Knights hail from Dorma and they use Greatswords, so..... New Tank Confirmed!

http://finalfantasy.wikia.com/wiki/Rune_Knight

Dorma was also home to Samurai, Ninja, Blue Mages, Magitek Knights and Mimics who always cover their faces and have 1 "horn" on the left side of their head...hmmm...