hmmm i have every dps job to 50 (bard is on an alt) and in a fight with moderate movement i'd probably say:

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

as other people have said, black mage has to know when to move within a certain fight/what tools to use, or their dps will drop immensely

dragoon has a long rotation that it really complicated, but annoying, especially if you get interrupted for whatever reason

maintaining greased lightning during some fights is a fight itself

i actually find summoner fairly straightforward and simple, and your damage isn't really affected by movement at all

bard is just like summoner, except you don't have to control a pet