What can live with tetras other then tetras?

It depends on what size of aquarium you have. I have a 10 gallon aquarium and i have 7 tetreas and they seem to do fine with my green cory catfishes. They dont bother fish on the bottom hardly ever so catfish and suckers are fine. If you have a loach it may be agressive towards them just because of there size. Also beware of getting fish with long flowing fins because tetras are fin nippers. So if a fish that isnt described here is in your mind of getting and you have tetras then you can get it.