Advice for new fish

[molybdenumman]

I will be setting up my new 90 gallon tank in the near future. I have a yellow tang, coral beauty, tomato clown, hippo tang (appears to be sick) and a clarkii clown. I have lots of soft corals and a few hard ones.

I am looking to add at least one, maybe two (larger) fish. Can anyone recommend some appropriate specimens based on my current environment? I was thinking something like a naso tang, but I am still quite open to ideas.

DanTheMan