I DID attempt to eat the various raw meats I collected from deer or necks, but sadly you are unable to eat them to even gain HALF the benefits (maybe get a bit of sickness like in Minecraft). I still consider these foods under the basic category, simply because all you need is a fire and a spit to cook them, nothing advanced whatsoever, you could slap down a tiny camp out in the middle of the forest and be cooking them within seconds.
That being said, these are obviously SLIGHTLY more effort than just picking up berries, so they offer a lot of better benefits. I also recommend filling your food slots with cooked meat if you can, they give you the most health and stamina.