What's the minimum selection of currently available canned foods that would provide good nutrition for the best value? TIA!...
Tomac
Peanut butter lasts about a year before it goes bad. Spam is a good choice, as is canned corned beef. Just about any canned vegi is ok, and is good to eat as long as the can isn't bulging. Chili, corned beef hash (in addition to corned beef lunchmeat), tuna, tuna, tuna... keeps until the radiation goes away.

Most modern foods are good to go for at least a year, such as crackers, cereals, etc., so long as they are kept in their original un-opened packages Hope this helps. We keep a little bit of everything... but especially those foods that we wouldn't
have to heat up to eat it if we were in that sort of situation.