what do you guys think about peacock cichlids?
can i house a peacock woth a small to medium sized oscar?
any other possible info will help, i love their colors!

Assuming you are talking about a peacock cichlid and not a peacock bass then I would personally advise not to keep them with Oscars since these are actually African. Without doing some extensive research I can't give you a great deal of insight into these fish since I didn't keep them, but you may find that their water requirements differ from that of an Oscar fish. I'm sure quite a lot of people make different types of cichlids but from my personal point of view, I would avoid mixing South American and African.