Acacia baileyana prostrate or the Cootamundra wattle ground cover makes a stunning display and looks great planted under Eucalypts like this one especially with the dark bark of the Ironbark. They do prefer full sun but will tolerate part shade and can lift an understory planting with their silver foliage. There are many ground cover wattles, some of them do tend to get a fair amount of height to them by sending up random leggy stems that can be pruned back if you want them to be more carpeting like the one pictured.