So for example, one Bala Shark will be nervously looking for more Balas Sharks. Mollies do best with 1 or 2 males and several females not just one male and one female. Zebra Danios prefer to live in a group with at least 6 Zebra Danios. All of the fish you list, except the Plecostomus, prefer to live with 6 or more fish of their same species. So you need a bigger aquarium with a few more fish of each type of fish that you listed in your email.
Lets make a table and total up all the numbers.
In this table I made a row for each type of fish on your list, then I included the number of fish that you should keep, and finally I guess-timated a size for each of these types of fish. My guess-timates are not the maximum sizes, but sizes these fish will grow to be pretty soon. So you'll need a 60 gallon aquarium to give these fish plenty of room to grow and to live with several members of their own species like they prefer. The Bala Sharks will grow and need bigger aquariums. Click here to read a story about raising Bala Sharks.