Alchemmila Mollis (Ladie's Mantle) would do well there, and the daisy that another poster mentioned, the Erigeron, but they're both low growing. Sounds like Gardening Grandma has a lovely mixture growing, year round interest as she says. But I would be wary of the Japanese Anemones, they are lovely but I fight a constant battle with them to try and stop them taking over.