As I recall, the Farmer will be upgradeable to Herbalist, which will be upgradeable to a sort of magic class, the Alchemist. No idea if that is still the plan, of course, since that was from a bit of promotional material on the Kickstarter way back when. It’s possible the Beastmaster (tier 4 trapper) might be a bit magic as well. I wonder if the Cook, as alluded, might be magic in an upgraded class, too.
But if you mean the first magic-wielder, like as a combat class, I’m sure they need to get the Archer implemented first for ranged combat in the engine before they can start doing crazy magic spell casting.