Klein butterfly, coral beauty, 2 damsels
I'm sorry to pile on, but these fish are additional problems that could equally well have led to the tang's demise.
Any of those listed fish would be capable of taking a serious exception to the tang's presence....bullying is a major stress. Stress can cause color loss and loss of appetite. Stress plus loss of appetite eventually cause their immune system to become depleted, which is pretty much it for the fish.
Next time I would suggest going
much, much slower with the whole tank setup and especially with the live-stocking.
In general, I think that a couple fish your first year should be more than enough challenge. Try to pick something you have a shot at getting to lay eggs. (Clowns are an obvious choice, but not the only choice!) Read some of the posts on this search:
pregnant Whatever you pick, practice getting them fat and happy
while also successfully managing a stable tank environment. Regardless of what you see others do, this takes practice and you'll be making mistakes along the way. Subject as few wild critters to your mistakes as possible. I've tried to always keep to that policy.
After a year or so, you'll have a much better chance at keeping a larger population alive, should you choose to do that. But you might not choose to! I really like giving fish all the room I can afford, so I tend to keep fish populations low. At home I keep the fish number
very low, keeping mostly corals and inverts. Systems are much more stable in general when run at lower nutrient levels.
2¢
