Agapanthus
Aka: Lily of the Nile and African Lily
Size: 1 to 3 feet tall depending on variety
Lighting requirements: Full to part sun
Seasonal interest: Summer blooms
There are quite a few varieties available. I love the dwarf 'Peter Pan' Agapanthus and the larger 'Elaine'.
Considered deer resistant on most lists, but I've seen them eat it.