Red False Yucca
Red False Yucca is better behaved than it's common name connection to yucca, but is still heat and drought tolerant. It makes a tidy clump of blue toned blades but doesn't make offshoots every which way. And the flowers are spectacular- dozens of salmon colored tubular flowers attract hummingbirds throughout the summer.
This has been our plant of choice to replace New Zealand Flax that have died this winter. It comes from the high deserts of Texas and Mexico, and tolerates our cold winters well as long as it has well-drained soil and full sun. The sturdy blades are not sharp or pointy, so they would work near a path or pool and get about 2-3' tall and wide with the flower spikes reaching 4-5' tall. It is also deer resistant and does well as a focal point in containers in a hot spot.