I have a fair number of natives in my garden, some of which are super butterfly magnets.
NE Aster; Maximilian Sunflower also is attractive to Monarchs;
another BF attractor extraordinare is Boneset
I also grow Downy Skullcap, Goldenrod, Dame's Rocket, wild blue phlox, wild violets, dandelions (not intentionally). Jack in the Pulpit, Ostrich Ferns (not sure they're native), Soloman's Seal, and largest of all, Paw Paw Trees.