no problem.
if you do try it, watch the fish first that you will put in the tank. Make sure its a bad one and has harrased or killed fish, especially ones that are more agressive and bigger that it. Then you know that it will be able to defend itself with the Male Con. I had a molly that killed an african cichlid, so I know that if I wanted to put it in with those fish you mentioned it would definetly beable to defend itself.