How should I stock this aquarium?

The rule for fishtanks is that there should be one inch of fish for everygallon. So u can get quite a bit of more fish! In my personal experience, any type of tetras are great to look at and with eachother. But in the past I got a school of tiger barbs and there were freely agressive and kept biting my otherfish so I returned them to the store! The air pump is good, and u need a filter and a heater. In my tanks I have mAle and or female DWARF Gouramis! There very good looking and Great tempered! But the femalEs are hard to find! Also platties would do good, any tetras, danios,'guppies. Cories for eating left over food, Otos for algea, pretty much any fish