Some good evergreen "soldiers" include:
Juniperus virginiana `Idyllwild`
Moderate growth 15 feet tall, 5 to 7 feet wide.
BLUE POINT JUNIPER
Juniperus chinensis `Blue Point`
Moderate-growing to 12 feet tall, 8 feet wide.
Juniperus virginiana 'Skyrocket' (J. scopulorum 'Skyrocket')
Fast grower to 15 to 20 feet tall, 2 to 3 feet wide.
WICHITA BLUE JUNIPER
Juniperus scopulorum `Wichita Blue`
Moderate grower to 10 to 15 feet tall, 4 to 6 feet wide. Larger with age.
For small shrubs I'd suggest dwarf yaupon and Japanese barberry.
There are lots of good perennials to choose from. The following web sites offer more suggestions:
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