I had tiger barbs and a red tail shark which I rehomed with 3 angels ,in my current tank I have the 4 acara with 1 standard acara 2 convicts n the gt which I’m still trying to rehome oh and a leopard Sailfin , these are all going into a 5ft 400l at the end of the month as I’m turning my 4ft into MalawiYou could try aquaristclassified in the UK too.
Please dont get an Oscar your tank is not big enough. To be honest with 4 Electric Blue Acaras and 2 Convicts you are at your limit for cichlids. I can see you have Tiger Barbs in there as well what other fish other than cichlids do you have?