I would love to see a Berserker/Rune Knight class that used 2h Swords.
Going by how FFV's Berserker went, it would more likely be added as the second job to Marauder, though its positioning as a damage dealer would most likely be attacking from the front rather than the sides or rear like Monk or Dragoon to maximize damage output, putting them at greater risk, but being true to the nature of what a berserker does.