Ohhh, sorry, you might want to update your pro-file

If you were going to stock a 55 gallon with those fish, buy them at these sizes, a 2-3in Tang, 3-4in Dogface Puffer, and an size Coral Beauty Angel. Anyways, you can house any tang with the same body shape as the yellow tang, no naso shaped tangs. When you get a 100 gallon, if in fact you do, a naso shaped tang would be fine, for they love to swim fast and long straits. As where the yellow tang like tangs, like to swoop around in circles or stay in one place. Sounds like you will have a good tank set-up, good luck!