What are the best animals for a 60 gallon cube?

[Gabe aqua]

I just experienced a death in my tank a Tomini tang that died randomly because he was doing great and my parameters were excellent. But I already have 2 paired clowns, 1 yellow coris wrasse, a cleaner shrimp and 2 montis and 3 frag of zoas. What should I add to this smaller tank to add color and utility.

 

[Sebastiancrab]

I love my royal gramma. He would add a lot of color.