Quote from Alsarwolf;1247378:
The best race for alchemist?
To piggyback off tropacat's response.
I have two really big issues with alchemy. The first is a matter of durability consumption. The second lies with the necessity of it requiring two weapons. This may not seem like a big deal but when you eventually have every single talent at your disposal, you have to take opportunity cost into account. It's fairly easy to switch weapons during active combat, but it's much more problematic when you have to switch out two. That provides just enough time for you to potentially lose control of a situation.
Humans are a safe bet due to them having access to every talent. I very highly doubt that they'll be excluded in any future content updates.
Elves have some issues right now with their primary talent, archery, but their access to Hide allows them to safely plow through content using Hydra. They also have the fastest movement speed, full stop.
Giants are exceptional at a number of talents, namely melee. They can wield lances (strongest melee weapons) with the rebis guard cylinder. This gives two forms of potent offense and allows effective hybridization in that you can access elemental wave and hydra with just one weapon swap.