Some friends of mine were working on starting LotR a few years ago, but their motivation petered out (much to my sorrow). The recent wave of releases has them interested again so I'm looking to turn the few models I have into a force for evil and was wondering if you wise folks can help me out.

I presently have a Hasharin assasin guy who I cant seem to find on GW's site and 24 assorted haradrim warriors (two boxes worth).

I'm looking for suggestions to add that would allow me to field an all southerling army, and also interested in buying some easterlings at some point. Is mixing and matching from those forces viable/interesting to play/kosher?