My opinion is no more fish other than what you just listed above. You can get away with shrimp here or there but they have very little bioload and don't affect your parameters a much as 4 fish do.
Not sure about the lobster, I would think it might eat your shrimp. but I really have no idea. lol
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.