When our neighborhood was built, all the houses had gorgeous azalea and rhododendron gardens many of which still exist. However, the previous owners of our lot weren't big on upkeep and ours is in sorry shape. There are huge holes where shrubs died and were never replaced and a large gap where a tree was removed several years ago. They apparently replaced that tree with a crepe myrtle, which being too far back in the shade, hasn't bloomed once in the almost three years we've lived here. I'd really like to restore it to what I imagine it once looked like based on what remains. But other than identifying what's planted in there now, I'm not really sure where to start... Any suggestions--even if it's just an ID--would be appreciated at this point! Thanks!

The first picture shows the portion of the bed that's largely intact; the second two show the 'war zone' that needs to be reconstructed.