You can move peonies but need to replant them careful as too deep or too shallow and they won’t flower. The best Uk supplier is Kelways IMO. A huge family of flowers if different heights and flowering times etc.
The lovely one known as molly the witch is of course good in shade.
You could always grow potatoes and use the great and easy to seed and weed ground cover plants limnanthes douglasii , known as the poached egg plant for this year to clear the ground.Then muck over winter with some HORSE not cow manure and STRULCH. And get plants and bulbs ordered and chosen.
bear in mind that most things only need a few inches of soil unless trees of course… so don’t dig up the builders rubbish to the surface but let the worms pull goodness down.
Roses if you like hips Blance double de Colbert ,maybe phlox, hydrangeas lots of choice and magellanica type fuschia , and underplant with geranium phaem lily Lovell and others like Patricia, and maybe lamium pink Nancy and other lower growing perennial geraniums.
Also different Astilbes,Astrantia ,Bergenia some good ones with leaf colour, Persicarias but not everyone likes these dock looking plants . Fanny has these in her swampy chapel garden
Good bulbs would be chionodoxa, muscari latifolia. NOT the common one….. good daffs that don’t have big heads and drop down for the weight eg white lady scented and a great cut flower. ( uk Avon bulbs) Amongst your hellebore you could right now carefully plant some snowdrops bought in the green and some allium nigrum.
Sorry I do have opinions
Many of us lost shrubs to the frost this year
![Frowning face :frowning2: ☹](https://cdn.jsdelivr.net/gh/joypixels/emoji-assets@5.0/png/64/2639.png)
I consider this sad but a new opportunity!