Really appreciate the pictures and info, LG, Karen.
Making comparisons and will certainly follow Liz's advice.
I've been planting and maintaining mixed perennial beds for over 30 years but only came to peonies less than 10 years ago. We now have too many for our own small property but really recognize some of their attraction (not least their hardiness and longevity). Have heard it said that the average longevity of herbaceous perennials, in mixed perennial beds, is 3 or 4 years. Of course, the unruly (prolific runners and seeders) do much better, but are really part of the problem.
And like the garden phlox, everybody notices the peonies when they're in bloom; such lovely colours!