Meat is great. As is raw diary. Eggs. Honey. Fruit. And even some rice and potatoes, for hard physical workers of sport and otherwise.
Like many carnivore advocates say: plants don't want to be eaten.
Check out Ray Peat and Saladino's "Animal Based" Diet.
https://heartandsoil.co/blog/the-ultimate-guide-to-the-animal-based-diet/