For the colored ones I like the Mandrian (any variation) and the Catalina Goby (wish they were bigger).
For simple black and white I would go with the Morrish Idol. Who would have thought that 2 simple colors could look so dignified. This fish though I will most likely never keep one due to its unfavorable survival rate, has the best look of all the fish I have seen to day.
Most Angels look great as adolesants but dull with age.