Juvenile Oscars I mean, not full grown 14"+ ones lol. I had 2 4-5" Tiger O’s, and 7 Tiger barbs in my 55G with no issues. Now in my 55 I have 1 Tiger Oscar, which isnt growing real quick, or at least to me, 1 Tinfoil Barb, and a Pleco. Works out good b/c when I feed the Oscar krill, and it comes out his gills, the Tinfoil eats everything up.
My oscar is ridiculously smart, knows who I am, always comes to the tank to see me and I tought him to be hand fed. Coolest fish Ive ever owned