hi, sure you get a Snow flake eel, I have one myself, very nice eels! You could also get a dwarf lion or 2. I'd have to know the dimensions of your tank though to give most accurate idea of what you could put in there. Maybe a toby or wrasse. I have a snowflake eel with a dwarf fuzzy lion, porcupine puffer, yellow head eel and bluelined grouper, all get along fine! You could do a grouper depending on your tank dimensions but I would reccomend against it for the long run so maybe some anthias or hawk fish.
Good luck!