Those 2 fish are gorgeous! If you add anything, I'd add something eel-like in shape. Oooooooh a Midas Blenny would be a beautiful pop of color and the swimming pattern would showcase him.
I would love some sort of eel like creature. I’ve been wanting a golden dwarf moray or a skeletor eel since I love predators but my wife hates them so I’ve been holding of.
Midas blenny you say...that might be something to consider