4. Barbarian 

Best Stat Based Choice: Human, Half-Orc,  or Lizardfolk 

Barbarians are people of the wild, who disdain "civilization" and its benefits in exchange for a deep connection with their environment and a physical prowess that most civilized people can't ever really achieve. The "savages" tend to be people who live short, brutish lives, but their ability to survive extreme situations, especially when doing so in their own lands gives them a strong advantage over those who have lived more sheltered lives.

My choice: Lizardfolk make the best barbarians with a because they have natural benefits like a Bite, natural armor, Hunter's Lore and Hold Breath prefer to live in swamps and forests, far from civilization, and their level of sophistication is never much more above that of reptiles. But their innate reptilian abilities make them perfectly suited for their savage lives wherever they might originate from.