This is by no means an absolute last word on the subject, but the crops recommended are worth consideration.
If you have a seed repository in your prepper stock, read the article for some discussion of why you might choose these particular plants.
https://www.backdoorsurvival.com/13-best-staples-to-consider-for-a-survival-garden/Obviously, some crops will be better for your particular climate. Do you research on this before buying seed stock.
A MAJOR factor in your purchase will be Non-GMO, Non-Hybrid seeds. The intent is to be able to keep seed from each harvest for next years crop...
Some commercial sees are deliberately hybridized to only produce one crop with the desired qualities... It's call agribusiness...