6 Staple crops to grow to prevent starvation: Potatoes, corn, beans, squash / pumpkin tomatoes, & cabbage. Each are prolific croppers and store well when preserved. Best Strategies for Growing a Reliable Survival Garden - The Provident Prepper 5 more survival crop suggestions https://youtube.com/shorts/kuZ-DjjTBKg?si=768To7mr3qeBdeJx
Also, wheat and greens (turnip, rape, kale and collards). The wheat gives you a second grain crop, it grows in the winter and is harvested in the spring, and it stores well. Greens because they will grow year-round, although only collards will survive extremely cold temps., and you can preserve them by canning and freezing.
Although I was pitching this video to folk on small acreage and suburban blocks, however if one has ample space for grain crops (other than corn, which is recommended in the video) then by all means, depending on one's climatic zone. Diversity is always good. For a suburban block, Amaranth is a good grain crop choice...it doesn't look like a grain so may pass muster in HOAs where food gardening is frowned upon. In some climatic zones Oats are an alternative to wheat.
With wheat and corn, you might be able to get two crops a year. Sow the wheat in the fall and harvest in the spring, usually May around here, and then plant the corn, a little late but ok with fertilizer and irrigation, for a fall harvest. Then you would want to plant a nitrogen fixing crop and allow the soil to recover.
