I know what grows well in my hot interior valley but the microclimates could mean that they would be miserable where you are.
One element that comes to mind for a portion of that space is echinacea (cone flower.) The classic variety looks like this photo but there are white and yellow echinacea and some with unusual petal arrangements. Most varieties are tall (4 -5 ft range) but some are shorter (2 - 2.5 ft.) I have a mixture of varieties and heights in full sun where I live in the inland SF East Bay and they do quite well. They don't require much care. After the bloom is spent it should be deadheaded but there's only a handful of blooms on each plant so it's not a lot of work. Other than that, the foliage should be cut back almost to the ground at the beginning of winter. That's it.
Another one is justicia suberecta (sometimes labeled dicleptera suberecta.) You won't find this at Home Depot type stores, but it should be available at a good nursery. This is a short,hardy plant (2 -2.5 ft tall) and requires about as much care as the echinacea. Blooms are small and plentiful, no deadheading needed except for the early winter cutback. Caution here -- be sure to find the 'suberecta' variety as many others are full size shrubs.
edited to add: my avatar is a rockrose (cistus.) They're mounding shrubs with a short but intense blooming period. Some varieties are short, some are tall. Rockroses need a good trim once or twice a year.
Another good small mounding shrub with a much longer blooming period is germander. Teucrium chamaedrys is the common low mounding variety, but be careful because there are other germanders that have tall and/or rangy habits. The leaves are tiny and evergreen. The little purple flowers last for a long time. I keep mine pruned into mound shapes but they can be allowed to form a solid mat too. Mine line the driveway -- can't get much hotter than that.