Most people here have a bias against meat, but the answer to that question depends on who you ask.
Personally, I think a raw primal/paleo diet is the healthiest and makes the most sense. Raw meats, raw dairy, raw fat, raw vegetable juice, some fruits, some fermented foods, some herbs, etc.
The main disagreement people have with that is the worms. I think worms are janitorial and not pathogenic; some worms even have POSITIVE benefits, like the hookworm, and yes, even the whipworm as hard to believe as that is. Herbs keep it in check either way, and they won't flourish in a healthy clean environment.