Small-flower penstemon is a pollinator powerhouse and one of my most recommended plants. It has a lot going for it: shiny dark green foliage that stays green all year,  low water use, loads of attractive blue-purple flowers that draw in masses of tiny native bees, and a clumping habit that is well-suited to garden life. Additionally, it tolerates a wide range of conditions as long as the soil is well-drained. 
 
The color and timing of flowering for this plant (mid to late sping) make it a perfect companion for the yellow blooms of woolly groundsel, but I also love it with Antennaria, sticky geranium, and alumroot. This plant does  have a tendency to spread a little via seed, so keep that in mind if you are hoping for a very ordered garden.