Top two photos: Annabelle Hydrangea (Isn't it just ridiculously gorgeous?). Oakleaf Hydrangea (lush leaves resemble oak leaves). Both require minimal care after the first year and are drought tolerant plants for partial shade areas. Bodacious bouquets.
Bottom two photos: More lilies. As you can see they come in all shapes and sizes. They spread nicely and are easy to divide and spread around your plot. (Hmm. All this garden talk is making me want to go the nursery.)
Plants in my garden must pass the low maintenance test. Sure, I will add compost, deadhead and water (only in the severest drought), but that's about it. I also use no chemical pesticides or herbicides. It helps if you purchase plants that are native to your region. Ask for these at the garden center.