This kind of question is a bit open ended and you may get various answers from the community.
I think the safest bet would be Dras or Kypiqs.
Dras have resistances to poisons and diseases and live in extremely diverse biomes.
Kypiqs seem to have a diverse biome as well, and they are intuitive tinkerers by nature. That and they have a legendary University for Alchemy called the Kinothian.
Runner up would be Neran I think. Jack of all trades, and they share the university with the kypiqs, although I think it's in the kypiqs biome (tbd)