I believe the original poster left out one - rawfoodism.
But even raw food approach understands it's not possible 100% of the time, and I think it's worth considering if you are trying a new approach that you don't have to be 100%. If you get a craving for a treat after abstaining for a month why not enjoy it every other week or so. What you resist persists applies to some degree.
Actual health benefits of any approach are questionable outside of other factors including weight, lifestyle and heredity. "Breaking" the pattern occasionally isn't going to nullify anything.
Personally I eat a conventional diet, but have a habit of calorie and protein (to a lesser degree) approximating. I've maintained the same weight for about 5 years. And I eat about 95% meals home-cooked generally with fresh ingredients with lots of flavor - thankfully not by myself!