Last fish for a 55gal suggestions/ideas

[singold]

I currently have the following in my 55gal. tank:

1) Mystery Wrasse
2) Bi-Color Dwarf Angel
3) Blue Angelfish-small juvenile (will be transferred to larger tank down the road)
4) Diamond Goby
5) ???????? (for a last fish in tank)

Any suggestions or ideas for a last fish to put in tank that is compatible with current fish?

 

[Triggerfish]

if you have a sand bed..how bout a jawfish

 

[jay02483]

cant go wrong with a pair of percs