Is WoL the only one able to master/handle all the classes at once?

[MrThinker]

Tataru Taru is both a Receptionist (spy), a failed miner and a failed Summoner (at least level 70) if you can call that taking on multiple jobs.

Apparently she also has skill in some DoH classes because she made quite a few outfits for the Scions, and us. So at least leatherworker and weaver, maybe goldsmith and armorer as well.