Jeff, where do live in central west Texas. What you can grow in Texas
is very dependent on what part of the state you live, not just the
zone, because of the extreme difference in humidity and soils.

In general, all of the hollies available at local nurseries do well on
northern exposures, unless you live in a rural area prone to
grasshopper infestations. Nandinas also do well. Spring bouquet
viburnum, as well as other viburnums will work.

For other shrubs, it will depend on your area. Perennials are even
more dependent on area. There are not many flowering perennials that
do well in shady areas in the western 2/3's of Texas, but there are a
few.

Bryan