Wow , there is alot you can add to the tank. With the porky add a more passive trigger , like a blue jaw or a niger. Any grouper ,except maybe a panther. they are a little shy at times. OY ! I guess you could add one of the more spunkier tangs or gobies. LOL I have probelms deciding what to get for my tanks. Start looking around at lps and online for more options. There is alot you can add
in my 75 i have the following:
porcupine puffer
antenna lion
snowflake eel
undolate trigger
blue damsel
if that helped any i do not know. its a pretty good combination i think though. all of them do there on thing. its pretty cool to watch.
you could add a jansen wrasse, a really cool fish or a harlequen tusk would do good as well wrasses are nice as they always are moving and add nice color.