Yes, the tetras would get along, but you'll want to be very careful with all those gouramis together. This is assuming that the paradise fish would get along, that would be the only questionable one with tetras.
Are you planning to cycle the tank first? Also, even once the tank is cycled, you'll want to wait a while for the otos because they need algae to eat. You'd want to wait until you actually have algae growing for them before you get them.