I also love tangs and all the color and personality they give a tank...
One fish I really like that has tons of personality and is stunning to watch IMO
is the foxface aka rabbitfish...
Check them out, they are easy to keep, like most tangs they love algae and are
constantly nibbling away, and have stunning colors.
Yes they do have venomous spines, but that also gives them another wow feature.
I have had one in my 135 now for about 8 months, and it is one of my favorites.
It can be a little shy at times and skittish, but it swims so fast around the tank at
times, its truly wonderful to watch.
My foxface now has buddied up with a scopas tang I recently added, and its fun
to watch them always snacking on the algae on the rocks together.
Good luck, David