Oscars are great fish but they get huge. They are also messy fish so when they are kept in smaller tanks they can easily get sick from poor water conditions. Hole in the Head is very common in Oscars.
There are quite a few smaller growing Cichlids you could choose from. Firemouth, Convicts, Acara, etc, etc... or any of the Dwarf Cichlids such as Rams, Apisto, etc...
In most of North Carolina the water is pretty soft with a low to neutral PH, so SA/CA fish will be easier to keep than Africans... although there are plenty of buffer recipes to help change water parameters.