I am wondering what type of fish I could put in my 100 gallon tank that will be good in a large group? I am wanting a good number of fish in my tank with a few larger fish in there but a good number of smaller fish. The larger fish I was thinking: yellow tang and I don't know what else but my wife may want a blue hippo. I was looking at the Anthias but I was wondering if I could put different types in there without having a battle royal. Any help would be appreciated.