Obligatory plug for self-heal (prunella vulgaris)! It's a perennial member of the mint family that produces pretty purple flowers that (according to my amateur observations) native bumblebees too large for clover can still enjoy! The plant is native to most (all?) of the northern hemisphere, and is unfortunately categorized as a weed by most lawn purists, which is actually just a testament to its hardy nature. Self-heal normally grows to about 1'-2' tall, but can also handle regular mowing and some foot traffic, just like clover, making it a great lawn additive or border plant.
