Michael,
With the gobies, sounds like you need a male/female pair so they don't fight. Might be hard to distinguish male from female in all species you picked, though I'm no expert. Also, the two spot goby grows to 3" while the other two only grow to 2". Personally, I would go with only one (not a pair) of the 2" species, and perhaps get a mid-water swimming fish, though I don't know what to recommend in that regard.
Also, DO NOT get a coral banded shrimp! They are predators!!!! Especially in a small tank like yours.
Plus, only go with one species of shrimp, either one blood or four sexy. Or two blood shrimp if you only go with one goby and no other fish.
Try to keep your bioload to a minimum and you won't have cyano or other nuisance algae problems down the road.
Kind of a stick in the mud, aren't I
Sorry