I think folks might be reluctant to make suggestions due to practical considerations that don't usually arise when discussing landscaping. Most people prefer ground cover to be low maintenance above anything else so Edible really cuts the choices. Consider that production from such a larger planting of a single plant will produce far more than a family will consume. Perhaps you can diversify plantings which might look better and not all struggling at the same time due to season and other factors. So instead of primarily looking at ground covers, look at traditional garden veggies that look nice. That will require lots of replanting as seasons change so you might consider some low maintenace ground cover(s) for a few areas so you have time to tend veggie beds.