What about 1 or 2 small/medium cichlid's to go with the oscar? would that work?Anything small will just be an expensive snack for your Oscar.
:iagree: apart from my oscar was fatter than 1" and he made my 180g tank look small.Pretty much, as long as they won't fit in his mouth they can live together. The problem is space. Imagine a 1" thick 12-15" serving platter (that is the size an oscar can end up being) in the tank. Imagine it swimming and turning in a 75 gal. It really doesn't leave much room for something else. If you want the oscar, and have a 75 gal, I would not put anything else in there.