I love the rockscape.. your tank is also very clean
very nice!!
dwarf angel can be risky (coral nipping).. I know many people (including me) have kept dwarf angels with corals though.
Mine (pygmy angel) nip on SPS but leave LPSs alone..
i think every fish is different..
have you heard Vanderbuilt chromis?? they are awesome chromis.. I had them in my frag tank.. they look awesome..
you can also try goby/shrimp pair.. they are really fun to watch BUT I would not recommend it if you plane to keep corals on the sand bed because they constantly dig/shift sand..