Ranking class by where their aDPS and rDPS is rather difficult and IMO the best way to make class distinctions it through personal dps classes "buff receivers" and utility classes "buff givers". i think Buff givers would have to come out ahead in rDPS by a small but noticeable margin and buff receivers would have more aDPS by a rather noticeable amount. This of cause only applies if played well and is optimised (e.g. only with "buff recievers" recieveing the buff would the "Buff givers" come ahead in rDPS and would otherwise level out or be at a minor dps loss). there can also be the "intermediary classes" who's output is more middle of the road in both rDPS and aDPS as an alternative whlist providing more unique ways of buffing the party e.g. extra SS, Crit or DH (though balancing a SS buff sounds to me like a logistical nightmare).
(Im no theory crafter and if this is a bad idea please tell me why as i would like to know!)

EXAMPLES:
Buff recievers as they currently stand would include: BLM, SAM, MCH
Intermediary classes as they currently stand would include: DRG, MNK, BRD, and RDM* or SMN* (*either could also be buff givers they're so neck and neck right now i'd say they both currenty fall into this catagory)
Buff givers as they currently stand would include: DNC, NIN (*and possibly one of the magic classes rebalanced for this role)

But thats just what i'd like to see