in my 225 I have 3 tinfoils growing out, a giant 17" pleco, 4 bichirs around 8-10" a clown knife, and an extremely aggressive chocolate cichlid. I too was going for the giant monster community of peaceful fish. my pink Giant Gourami is really good. the chocolate chases him sometimes but my gourami is a male and he is very very peaceful. hes a very greedy feeder but he doesn't bother anyone. I had a super aggressive oscar in the tank that beat the **** out of the gourami and chocolate and he had to go. so don't believe when people say oscars are all peaceful cause its usually depends on the fish itself.
another good idea is Irwini catfish, I have one in my avatar, gets to around 28" and is a giant raphael catfish.
another good idea is Irwini catfish, I have one in my avatar, gets to around 28" and is a giant raphael catfish.