DPS at End Game

[Raminax]

Either Monk or Dragoon are probably the most consistent of those three. Bards are proctastic in comparison, which may or may not suit well with your idea of consistence. Though admittedly, Monks and Dragoons have no procs whatsoever, when you think about it. Though I suppose there's also the issue of Bards being able to move and DPS all day long, as well... Ah, life is so complicated, isn't it?

while dragoon has better aoe and doesn't rely as heavily on position damage.

I find that an iffy statement. While it's true that Monks need to regularly switch between rear and flank for optimal damage, Dragoons can't use their Impulse Drive combo at all if they can't get behind their enemy for some reason. Monks just end up suffering from weaker attacks, rather than being completely locked out from a major debuff and DoT. :/ That said... I'd imagine a Monk who positions himself badly is going to mess up his DPS pretty hard. Those bonuses aren't particularly small, to be truthful.