My yellow watchman Goby is awesome. He isn't exactly paired up with my pistol shrimp as my pistol has made his home under my LR
. But they are still buddies, he most hang around that rock.
He just swims around looking for a place to nestle down and rest. Fun fish to watch, and their perpetual frown is extremely amusing. My little sister calls him Mr. Grump Face. Mine doesn't ever swim above the top half of my tank so I don't even fret about him jumping.
My favorite is when he swims agains the current from my powerhead until he finds a nice spot to lay down and relax.
I think the yellow watchman is a good choice.