80g- a fish list could be like

1-Picasso Trigger
1-Snowflake Moray Eel
1-Gold Strip Maroon
1-Banana Wrasse
1-Scorpion fish

That IMO would make a great tank. Triggers you are limited to a few speicies in a 80g Picasso aka Huma Huma are my favorite as well as the snowflake eel being the only moray suitable for a 80g. The others are easily replaced by other species. Its very important to introduce the fish in order from lest aggressive to the most aggressive. This gives the more mild mannerd fish a chance to take territory before the bullies move in.