Gouramis are generally peaceful fish, with the major exception of during breeding. I've had a breeding pair gouramis (albeit a different species) literally kill everything else in their tank because they felt that their nest was threatened. Because of that experience, I've never tried keeping females and males together in the same tank unless it was a species only one.
With that said, it's entirely possible that yours will be calmer, and that because the other inhabitants are primarily bottom dwellers, you won't have any problems. It also depends on how much cover is available in your tank. If the rope fish has places to hide out in case of aggression, or if there's enough there to break up the line of sight from the surface, then you may have better luck. Do keep in mind that if they do start breeding, you'll likely need to remove the female just after the nest is laid, otherwise the male will kill her since his job is to drive her off and keep her from eating the eggs.