Go native. Try ceniza (purple sage) which can be pruned for a grey evergreen - nice contrast, with it's small leaves and purple flowers if you get rain. Chili petins make a nice shrub but go dormant for a month or 2 Jan-Feb, when you trim them back. Native lantana isn't evergreen either but doesn't rest long, only enough for some shaping & pruning. I don't recommend tumbleweed but save a back corner somewhere for sunflowers for goldfinches and cardinals. A small dense seed planting of mixed local varieties can have the visual effect of shrubs. I'm partial to rosemary even though it's mediterranean. There are kinds that are horizontal and others more vertical. It too can be shaped with pruning.
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