We don't jump on anyone here for asking questions, however silly, trivial or obvious they may be, so if you want to ask something, or say something, please feel free, as long as it is polite then nobody is going to assassinate you, as you put it.
Oscars are great fish which mix with loads of fish with no problems whatsoever. Personally, I would look at all the fish that live in the Amazon and surrounding waters, in similar places that the Oscars live, a lot of these will make perfect Tankmates for your Oscar as long as you have got the room. If you're going to add other cichlids then always do a little research because the majority of cichlid are semi-aggressive, or aggressive so you always have to be a little cautious when mixing them.
