What other fish do you think I should get I have a 50 gallon freshwater tank with?

well, first i would up the tetra school to at least 6, and get at least 5 cories. then i would get a couple more swordtails (if you have a male, get 2 females, if it's a female, get a male and another female) finally, i would get a couple of hatchetfish or another top dweller.