Personally, I think Monk is the top DPS in a perfect world. (Which after 2.1 this perfect world will happen more often) Summoner and Black Mage when used properly are up there. Bard has the most up time but its top DPS is noticeably lower than other Jobs. Dragoons, until the patch fixing their jump animations, are just average at the moment. My order in the best conditions:

1) Monk
2) Black Mage
3) Summoner
4) Bard
5) Dragoon

LOL

6) White Mage (Cleric Stance + Holy)
7) Warrior
8) my pet cat
9) Paladin