Good classification... and point...

It would be interesting to know "If I were to survive 100% only on native (pre-EURO/Colonizers) food-stuffs, what would my diet look like?"

Don't forget too meat - much if the meat we eat depends upon pollenated foodstuffs - if we were to raise cattle, sheep and chickens only on grasses and local foods we'd likely have far lower heads of animals per farm and higher costs (which I'd argue for many would be a good thing, but for those who can't afford it, it would be devastating)

From what I've read, grains and soybeans are both self pollinating, so the meat supply is safe, so long as the Haber process holds out.

I found this interesting page:

https://en.wikipedia.org/wiki/List_of_crop_plants_pollinated...

Looks like corn, wheat, soybeans, and potatoes, are safe. So you can still have your burger, fries, and Coke. ;-)