personally my experience with triggers and sharks are that keep the mellow onces with them, like blue jaw, niger, pink tailed, black, crosshatch, those triggers are less tempermental and should be better tank mates for your shark. I would not go with an undulate or a blue line those fish might start off relaxed but eventually will go nuts, The clown trigger, if added last and happen to get a great one you can put one in with the shark but thats still pretty iffy. Choose wisely or your triggers will start to snack on your shark. Also Panther groupers are awesome, I apsolutely love mine, he's 15in and great, what a personality.