Thank you very much would there be any shoaling type of fish that could hold there own.If you have a Big BIG tank an odoe pike could work for you because they need space to swim, bt if you have 4 rocket gars then i guess you will have space for a odoe.
Another issue is that the eel will need space to hide so substrate or decor will have to be added (more maintenance and less volume)
Bichirs are also fairly passive so may be bullied
Giant gouramis grow huge and thick and need 200gals on their own, and may attack the oscar .
Thats my 2cents
Yeh I called up my lfs and they can't even get gg in so many they are of the list Yeh at the moment I have a 55 gall where I'm growing up 4 rocket gar and an Oscar and a fire well they are literally babies at the moment 3-6 inches so they would defo be on the list could there be any other cichlids that could also go in there or any catfish?? Thank you