This is my two and a half year old 55 gallon 48" x 12" x 21" with a 20 gallon sump.
Currently stocked with;
YWG
Firefish
Carpenter's flasher wrasse
Black Line Fang Blenny
Springeri Dottyback
The YWG and Firefish have been in the longest, couple years. The wrasse a year, Blackline six months, Dottyback just a month or so. Everyone gets along, the wrasse can be annoying, but the others just ignore him. I don't have any shrimp, and have no real plans for any.
I've considered Clowns, single or a pair. I have one in my other tank with a Tailspot Blenny, and she's fine. But, kind of been there, done that.
I would like to add another fish. I much prefer tank raised or aquacultured rather than wild caught. I just think it makes more sense. Any advice is greatly appreciated.