I'd worry about the red tail shark, not so much the red finned one. Red fin sharks aren't known for their aggression as much as red tailed ones, are, from what I've seen.
5gal: 2 Black Mystery Snails
10gal: 2 Mickey Mouse Platys (1M1F), 1 African Butterfly Fish, 3 Khuli Loaches
29gal: 1 Green Severum, 1 Convict, 3 Bronze Cories
55gal: 5 Bloodfin Tetras, 6 Black Skirt Tetras, 1 Blood Parrot, 1 African Brown Knife, 1 Striped Raphael, 1 Ropefish, 2 Clown Loaches, 1 Yoyo Loach, 1 Angelfish