Lentils
Leafy green plant or tree
A berry bush
Marijuana
Psilocybin
Although for the sake of greater nutrition--more fruits and vegetables and fat/oil seeds I may have to give up the two psychoactives.
The five may not exclude other things. You would almost always have a circumstance with trees and fauna having edible leaves. It wouldn't make sense otherwise and still have good soil. A knowledgable botanist would know some trees or plants that kill many birds with one stone: nutritious fruit, nutritious leaves, nutritious roots, medicinal or nutritious bark and stems etc, and/or fatty seeds.