This is an unnecessarily controversial topic. IMHO the thing that makes this such a controversial topic is the lack of nuance in the comments. The “Tang Police” will look at the world in the most idealistic way, which is not wrong, but it is not looking at the reality of what happens in home aquariums such as growth rate, mortality, refining potential, etc.
Many people successfully keep a singular large tang in an aquarium that size. It is not ideal for the fish but it can work. It is like keeping a horse in a one bedroom apartment. You can do it but it will not be great for the animal.
The Tang with the biggest issue, no pun intended, is the Lipstick/ Naso Tang. A full grown Naso will be over 18” and will not be able to comfortably turn in an aquarium that size. It will be more likely to be stressed leading to disease. I have seen large tangs in cramped spaces develop spinal kinks which is sad. When the fish gets to around 10” is when the first of the problems will start to occur for most fish. It will take three to five years for a Naso tang to out grow that aquarium to the point it causes real problems (14”). I bet the medium length of time for most fish in aquariums is less than two years (this is an estimate from my time in the industry). We tend to remember our limited successes and forget the numerous failures. If you are lucky enough to have a fish that long you have truly succeeded.
The thing to look out for at any size fish is how territorial they see and your ability to give them enough territory to be a good citizen. If you avoid the genus Naso, acanthus, paracanthus, and most zebramosa tangs you will be fine for the most part. There are always exceptions but this is the rule of thumb. One exception is the chocolate tang.
If you have a rehoming strategy and do not plan on keeping any other large fish, then I would go ahead and get any of the fish on your list. It is not immoral to rehome a fish. You should enjoy your slice of the ocean and just be responsible.
