It’s crazy how companies strip mine the topsoil of new developments to sell it off and leave the new homeowners with fill dirt and rocks.
I’ll just generally encourage you to plant natives, and I’d be happy to offer suggestions if you want them!
I was planting bushy St. John’s wort when I made that post. Have also added a new arrowwood, bluebells, blue mistflower, yarrow, and a “micropond” this year. HoCo and Columbia do lots of native plant giveaways every year so all of those were free.