38 gallon tank

I just recently got a 38 gallon tank. I plan on making it a freashwater tank. I already have 3 Corey cats and a tiger snail. I want to know which fish would be best to add that would be compatible.

Hey guys! So I have always liked the look of angel fish, and someone close to me is selling quite a few babies.  I have a 38 gallon tank.  I have a heater, filter and I can put an airstone in there if needed.  The dementions are 12.5x36x20 (WxLxH).  First of all is it tall enough for them? I...