We can do away with "pyramids". Canada's food guide for instance is pretty good https://food-guide.canada.ca/en/. Aside from lots of veg, you can balance the rest.
The Americanised diet had a heavy emphasis on refined carbs, added sugar, added fat, and no fibre. Thats a far cry from whole grains and pulses, which have been researched extensively and are thought to be healthy.