My guess is that fruits, cheese, and nuts? would be good, but boring after too long.
I average five fruits and vegetable servings a day, two servings starch, two protein, two dairy, and one fat. I do not obsess over what a “serving” consists of; I judge by fullness, which can be tricky, but if I overeat on any food, I make sure it’s fruits and vegetables.
You’d be surprised how much variety there is out there. There are plenty of plants and animals I’d never eaten before.