Tiger barbs are very nippy fish and if you have them it will seriously limit as to what you can stock in the tank, red tailed balck sharks can also get agressive and terotorial as they grow.
There are many species of fish that will be fine in a tank of that many gallons depending on what you stock together, although whatever you do remember to stock it slowly and only a few fish at a time depending on what you get and to also cycle the tank, preferably via a fishless cycle.
Corys make good bottom dwelling fish although they need their diet substituted with catfish pelets or similar and prefer sand or very fine rounded gravel for substrate as they are filter feeders that sift through the substrate for food. Albino, bronze and peppered corys make good easy to look after corys but you need to have them in preferably groups of at least 4 as they are sociable fish.
Neon, cardinal, black and bloodfin tetras make good small shoaling fish and need to be in groups of at least 6.
Livebearers like mollys, guppys, platys, endlers and swordtails also make good fish but you need to get the gender ratios right and they can produce alot of fry on a regular basis, read the livebearer section pinned articles for more info on keeping them, they are generally very hardy and come in a very large variety of colors.
Danios are also other good hardy fish that don't grow big in general but are very hyperactive fish and can be a bit nippy towards the slower long finned types of fish so be careful as to what you stock with them, they also like to be in groups of at least 5.
Small growing plecs like bristlenoses would also fit in your tank but need at least algae wafers and occasionly high protein foods like deshelled prawns to keep them growing.
You could also try a group of 5 female bettas, but no males and no less than 5 females.
These are all fish that what do well in your tank although make sure you don't overstock it and make sure you research your desired fish as much as posible before you get it.
