I decided to revamp the Uniter of stone more or less into my version including details like the "bones" on the original. I also didn't like the staff as it was difficult to pose the arms so I made one end a chain mace and the other a sword. His waist function still works and he has the Uniter port also. Mostly I just built him to look cooler than the rather basic look of the set.
Unfortunately only his sword can store.
Size comparison to kopaka and umarak
Unfortunately I don't have ketar or a ketar revamp for the Uniter function so here's him with melum.