Long term food or healing plants for all times to come.

Good evening friends! I'm looking for more long term crops or plants other than kale, apples and stuff found in food forests. Which plants out there feed and heal us for times good or bad?
Things in the world are rapidly changing and becoming more challenging as time goes on. I'm looking for ones that don't harm the native landscapes around us. Please reach me if you all need me. Good night.