I don't know if your tank setup has a lot of flow/current, but if it does, I highly recommend not bothering with trying mollies. When I had my TATF, that's exactly what I used as teacher fish. The mollies don't like a strong current at all, and a lot of them ended up dying from the stress of trying to swim with the increased flow. The ones that didn't die were killed by my TATF in pretty short order. They don't take well to being beaten up at all.
If you're only wanting them to be teacher fish and don't mind the ATF taking them out later, I would give the bala sharks a try if the TFBs cause any further issues. Just make sure they're of equal or slightly larger size than your TATF, and he shouldn't mess with them until he gets a little more size on him. Once the teacher fish have served their purpose, you can always return them to the LFS or give them away for free on the forum.