Interesting in the sense that I have not seen cichlids and barbs kept together. I have seen many strange combinations of fish , so I don't want to say that it can't work. You seem like you're very attentive to your tank so I don't have to say be careful and if any fish are being harmed, please separate them. If you can get them to live together, your tank will be stunning with large active tigerbarbs and bright, inquisitive cichlids.
Please keep us posted on your progress.
P.S. your platy doesn't stand a chance with labs and tigerbarbs.