The race will influence just a little bit the good or the bad of a job. After that, it's your skill. If u take ur time and build a character that u love, u can even make a taru Dragoon/Sam and it will not be bad. I play with a dragoon/war taru, and don't see the difference, or just slightly, but in a good group anyway, war are not to make damage, but to keep aggro on them, the one that are dealing damage to mob are the BLM, RNG and MNK.
So just choose want U want then u will have a good character