DRG is, apparently, at the low end for DPS as far as the melee ones go. That said... the expansion, along with all the class/job changes, did just come out so I wouldn't be surprised if there were to be some balancing acts done amongst at least some of the jobs within the next few patches so I wouldn't worry too terribly much on that.

If you're looking to just hit hard, SAM and BLM are good for that. If you're looking for speed... MNK and NIN are good for that. If you like the thought of bossing a mini primal around while doing your own thing, SMN might be fun.

I'd say take a look at some guides and maybe even watch some videos about jobs you might be interested in and see what one(s) click with you and go from there.