Fish compatibility

Soo I need a couple of suggestions for semi aggressive fish to put in my tank. I currently have a Flame Angel and a Yellow tang (also two black clown fish but they are left alone). The thing is I had a Copperband Butterfly, who seems to be on the way out, and I believe it's due to the stress from the tang since he became a **** to the copperband when I introduced the angel.

In short, any suggestions for fish that will go with those two would be great, more importantly, I think lion fish are sweet. Would I be able to put one of those in?

 

These are good sites to look for compatibility:

Marine Compatability Chart

Saltwater Fish Compatibility Tool - Rate My Fish Tank

Remember no two fish have the same tendencies. When it says "sometimes" it means "sometimes" as in it may work for someone else, but may not work in your tank and vice-versa

 

Lion fish are slow swimmers and basically peaceful with anything that doesn't fit in their mouth. An aggressive fish could rip it apart. I'd consider getting rid of the yellow tang if it is being a bully.