definatley a leopard shark is top on my list
but for fish that i actually have a chance of keeping: an imperator angel, blue girdle angels and a sohal tang - when i convert my 200 gal to my reef tank, sohal is top on the list for fish to add
ANYTHING ive had a small saltwater tank cycling for weeks and im going to buy some REALLY hardy fish tommorow because ive never done any saltwater setups before i want to be safe , so anything would be AWESOME