Hey,
I live in zone 6 probably a little closer to zone 6b but the same plant i list should work fine for you too.
We grow mostly the varietys of blueberries that you find in local stores lile blue ray, blue crop etc. They do well as long as the ground is prepared right. Also pink lemonade blue berries seem to do well and have a little bit different flavor.
I would say brambles do very well in this zone. So don't be put of by a sad one. We have thornless blackberry, black raspberry, purple raspberry, red raspberry and others. All are very good and grow well.
Figs tend to die back to the ground with hard freezes but usually produce a decent crop despite that. I'm planning on putting in a lot more. Brown turkey and chicago hardy are the two i have right now.
Persimmon trees, at least american persimmons do well also.
We are trying a lot more kinds of edible perennials but nothing is big enough to evaluate yet.
I reccomend experimenting, if it doesnt work out, try something else. Hope that helps!
