Most of the solanums that I grow are poisonous when green, and not very sweet when eaten raw and ripe. But they make awesome pies, jams, etc.
Wonderberry, a Luther Burbank cultivar I think, is the best raw.
The garden huckleberry is also a very nutritious green. I have some seeds from Cameroon, and some from Burundi, courtesy of the gardeners at the community garden that I run.
You have to be really careful with all these if you have kids. They are closely related to black nightshade and since most of these are poisonous, you have to get your seeds from a reputable source.
Yes, I grow ground cherries. My favorite cultivar is "Aunt Molly". I start them in the greenhouse quite early then put them outside. They are very tasty eaten out of hand, and have a slightly sweet pineapple flavor.
Cheers, Carolyn