Glad to know I'm not the only one to stuff my tank with fish
I have six tangs: Salfin, Naso, Sohal, Clown, Regal, and a yellow in my 230g. Once our other 230g is cycled we plan on moving over the angels and possibly adding a valmingi.
Smaller tangs (kole and yellow) are fine in 90g. Other tangs might be ok for a while but will need an upgrade later on.