A percula or ocellaris clown would be good. A bangaii cardinal would also be a good one. If you are willing to feed it, one of the lawnmower or sailfin blennies would make a good fish. I have one...he's so ugly you can't help but like him. Maybe an orchid dottyback? A royal gramma? Perhaps a 6 line wrasse?
Life is not measured by the number of breaths we take, but by the moments that take our breath away.