I love this tanks and unlike the others, i don't think you need anymore fish in there. When these fish start getting bigger, they will fill out the tank cuz they are all gonna be monsters.
are you running two canister filters inside? nothing else? is that enough for a tank that size?
i think you should wait till your current monsters grow to their true size. then it won't seem so understocked
Im running to fluval fx5`s and 2 ehiem 2252 internals I havent said anything about my stocking yet apart from im gonna up the numbers of pbass to around 10 and add more tigs