I have a mixed shrub border along our driveway that gets very little attention (out of range for hoses). I've just picked up inexpensive shrubs over the years for a pretty random look. My all-around favorite is
Burning Bush (Euonymus alatus) I do absolutely no pruning on this shrub, and it grows into a nice rounded form about 5' tall and wide, white flowers in spring, gorgeous fall color, and berries in the winter. No insect or disease problems. I realize this has been way over-used in parking lot plantings, usually prune-tortured into little balls or short square hedges (neither is a look I enjoy). I also realize it has escaped cultivation in parts of the east coast and has become an invasive (not sure how extensive this has become but certainly something to consider). It has not multiplied at all for me.