I'm quite impressed with these small evergreen shrubs, and I pass along growing information on them to you in the article linked to here in hopes that you, too may be able to enjoy their prodigious blooming period. Winter heaths live up to their name, putting out flowers in that most unlikely of seasons: wintertime. If the climate and conditions are right for them, they may end up flowering for about half the year for you. Now you know why I've located them at the top of my list.
The laurel bushes one finds in the forest can become quite large, but the 'Minuet' cultivar, true to its name (think "minute," as in "short") is a dwarf. That's a plus for urban or suburban landscapes where growers may not have much room to spare. This compact bush offers another advantage over its wild relatives, too: the flowers are more colorful, as you can see from the picture.
With 'Moonshadow' euonymus we come back to a green-and-gold variegation. But if you study my picture carefully, you'll see that Moonshadow's colors are reversed (when compared to their placement on 'Emerald 'N' Gold').
You may also notice that, on some of the leaves, the gold color is replaced by an off-white, instead. This happens as the growing season wears on; the spring foliage displays a shiny gold in the center. Both Moonshadow and 'Emerald 'N' Gold' are, in fact, at their best in spring.
Of the three euonymus bushes presented here, my favorite as a ground cover for a small space is Moonshadow. Its foliage grows densely, it's colorful, and it remains a short, compact bush with just a little pruning. Furthermore, my own plant, at least, has shown very little inclination to revert back to an all-green state (as euonymus is wont to to).
Boxwood isn't as colorful as the other small evergreen shrubs in this list, but its classic foliage is attractive in its own right and it makes for a good foreground or background for other plants.
Here's one idea to consider in this context. Set off a border of red salvia, under-planted with white sweet alyssum flowers, with a hedge of dwarf boxwood. The rich green backdrop of the latter will enhance the viewer's appreciation of the red and white flowers.