I've got several acres - much of it is woodland. I haven't got the ambition, or even the desire, to get rid of the many wild violets that cover the ground. My problem is that the violets have taken over much of what I've planted. So far, the only plants I've found that will grow through them are turtleheads and coral bells. Can you suggest plants that can live harmoniously with violets in my zone 5 garden - particularly plants that are taller so they will be noticeable?