well, to start, your clown loaches and possibly the pleco are going to get too big for a 29G, so I hope you have plans to either give them to someone to take care of, return them to the store, or get a new tank
. Your fishies will appreciate it a lot.
As per your question, I don't think you should add any fish. You are pretty stocked right now, and those fish I mentioned are going to grow quite large, so I would hold off on the mollies.