For something that can be stored forever, which is sounds like you want, you're going to have two choices:

The red wheat/dried corn/dried legume/beef jerky diet, packed in nitrogen or carbon dioxide.

Or

Elevated sodium content- it is a preservative and desiccant. But your dehydrated stuff isn't as bad some of the other options that don't last as long. So long as your seal is good, the mountain house cans supposedly last forever.