IMO try sticking to medium sized fish that aren't known for being super aggressive [Disclaimer: Fish have different personalities and even some of the meanest fish can turn out to be pansies and some of the more passive fish can become terrors].
Some fish to look at (not all of them, but look and see if any catch your interest): Green Terror, Jack Dempsey, Salvini, Nic, Vieja Regani, Carpintis Escondido, Severums (they come in a variety of colors).