One thing I keep seeing missing is salt.
Salt is essential for survival and goes a LONG way to making anything taste better.
Add some multi-vitamin and mineral supplements.
Rolled oats are another good grain to keep on hand. They’re very high in minerals and are easy to cook and dress up so as not to be too boring.
You can put about ANYTHING in oatmeal.
Trust me on that one.
Salt will also make an excellent bartering item......and it is cheap to store. One pound is about 50 cents. Stock up now.