Ladys mantle dwarf yellow-green blooms all summer
also comes in red.
Pussytoes for a white or silver color.
Rockcress white or pink.
several types of Bellflowers bloom from
spring to fall in a variety of colors.
Clematis x jouiniana 'Mrs Robert Brydon' this variety of clemtis works well as a grown cover.
Corydalis comes in a variety of colors and can bloom very early.
Hardy Iceplants bloom from
spring to fall and come in a variety of colors also.
Ornamental strawberries this one might be to aggressive you know how strawberries can be.
Hebe will bloom several times a year the last time going into winter.
Sun
roses will definitely give you great color in your ground cover
Bitterroot will bloom
spring through summer and a variety of colors.
Lithodora blooms
spring and fall and comes in a couple of different blues.
For-get-me-knots purple in color
Moss Phlox
spring flowers in a variety of colors
Anyway these are a few I found that you might like for your garden. If you can figure out the amount of sun that spot gets it will be easier to make good selections as to which
plants would do best there.