This is a nice collection of small fish, very colorful and peaceful. I would think you would want a yellow fish to add to the mix. Or 3 anthias....the lyretail anthias is a wonderful addition, just be sure they are eating before putting into the display tank. They can be somewhat iffy if not eating. But, that is what the quarantine tank is for.
As for a yellow fish....The yellow coris wrasse is flashy, and not a scaredy cat.
I wouldn't give up on the foxface, certainly do able in your tank. But, it would definately be the biggest fish. I really like mine, he is very trusting of me, and likes to take algae sheets that I hold in the water out of my hand. He has never tried to hurt me. In fact if anything he lays his dorsal fin completely down when I am working in the tank. Like I said, he is very trusting. Get a small one to start with. It's not like it will grow that big, that fast. I have had mine about 18 months and he has grown in gerth, not length. (obviously he eats well. LOL)
Good luck with your selection.