See my signature for my fish list. The blue gourami is the only one I'm worried about being mean. The barbs are a young school and stay to themselves. The tetras rule the roost.
Don't get any of those. Jewels can be quite nasty, and the rest are cichlids that need higher pH and are pretty aggressive compared to community fish. Get some rams.so if I just get one 5 inch one, I should be fine? The store has jewell, electric blue, yellow, moliro and acei. I think as long as I don't get a pair of breeding fish, they won't get evil.