Well then, with what other people said about rope fish, do you really want them? I think they would look very cool but I don't think you could keep any groumis or butterfly fish.
You might also have an issue with algea since you have fake plants (not necessarily though). Seem like you might be stuck with deciding between smaller community fish or cichlids and rope fish.
The majority of my tanks are smaller community fish but I do have 3 tanks with larger fish in it (2 cichlids tanks and one gold fish tanks). The plus side with bigger fish (cichlids) is that they are very interesting and have peculiar antics-but require more maintenance with water changes. The plus side with smaller fish is that you can add more fish to the tank than with larger fish-but some say they are not as cool as the big fish.