Corn or Maize style plant would be awesome. I like that they would grow very tall and possibly be one of the taller plants in the game usable for privacy or cause a slower walking speed when trying to get through them (hinder enemies?).
However I believe the landmass cultural history of Vintage Story is closer to Europe/England etc than the Americas, hence we don't have potatos since they came about much later than 1300's. Likewise, corn/maize originated in Mexico and wasn't until just before 1500's that it was exported back to Europe.
It is quite likely that we won't see many plants from the Columbian Exchange period in Vintage Story vanilla. I know we have *some*. Source: "After the arrival of Europeans in 1492, Spanish settlers consumed maize, and explorers and traders carried it back to Europe and introduced it to other countries."
I am all for more types of plants, however