red tail giant gourami

Red Tail Giant Gourami about 8-9”. Eating pellets, tilapia, and shrimp.

I have a red tail giant gourami, six bar distichodus, black shark, lemon fin barb, albino oscar, and a flagtail prochilodus. Would looove to replace the oscar with either a fat sleeper goby or some other oddball though.

Thoughts on a fat sleeper goby in an eight foot 240 gallon with a red tail giant gourami, black shark, and six bar distichodus? No current aggression issues and the dithers/catfish are ignored.