BLM - Very few limits on it's dmg output and easily the highest numbers/hit of all of them with few exceptions, in specific fights.

MNK/DRG - With the right fists up and against single targets MNK wins alot of the time but power surge and gear can bring a DRG up to and in some fights easily surpass MNK.

WAR/BRD/CNJ/PLD - All of them can post numbers that are decent.


To say a little more:
BLM doesn't need much said. It demolishes things, and because of the "Any job can solo even matches" it can still take a hit or 3 w/o dying outright.

WHM is really hard to slot since so often it's not doing much, if any, dmg in "fights that count". In the few that I have seen them as pure DPS(a couple of safety run Ifrits while teaching newer players, usually 5~6 ppl who know the fight well and 2~3 new) they often manage top 3/4 if they aren't pushed into healer mode, mostly because they can freely cast/combo like a BLM and with little planning can effectively spam stone > stonera > aero > aerora > stone > aero > stone > stonera > aero > aerora blah blah blah w/o stopping.

MNK/DRG can though not nearly as easily as BLM out do the others but in most of the fights "where it counts" you find yourself breaking combos or having them broken which nerfs your DPS.

WAR w/ berserk up and DPS geared can post some damn fine numbers, w/ rampage up they drop off alot now steel cyclone+rampage is still the best way to wade knee deep in masses of mobs while posting sick numbers, but that's not really relevant to many "boss" fights.

PLD again geared for DPS post surprising numbers though long recasts can hurt if your not using all combos, if you are using them all PLD really isn't bad, course you have to move around which rarely makes melees happy, but if your in a ranged heavy party it's fine.

BRD still posts decent numbers the "nerf" to light shot wasn't exactly devastating, and with no position limitations beyond distance combos are still easier to hit than on melees.