Cichlids are great and you can certainly try a community in a 180, but I would scale it back a bit though on size and aggression. Have you ever kept a Butti, or attempted a large aggressive cichlid community? Buttikoferi is eventually going to need to be a solo fish in a 180 gallon, no matter which way you slice it. You won't get 4-5 fish of the size and aggression of a Butti (would be hard to find that many species that could keep up with it anyway) in a 180 long-term.
A cichlid community is honestly kind of a delicate balancing act that will only be made more difficult by going for the meanest fish you can find, which don't lend themselves well in this kind of a setup. A 180 gallon may seem large at first, but to fish like Butti or Managuense, it's a small tank to attempt tankmates. I think going for fish that are more middle of the pack in terms of size and aggression is going to be your best bet at having an enjoyable community, and keeping it males only like stated is a good idea. Fish like Carpintis, Lyonsi, Loisellei, Jack dempsey, will give you a better shot at success. You will want your water on the hard side with higher pH for these central american fish.
Or, you can go the South American route, which will be far easier in general as the fish are more tolerant of each other. Large geophagus, crenicichla, severums, many choices for large cichlids in a 180. This will be a less stressful setup for sure. pH and hardness should be lower for this setup. So, which direction you go may be dictated for you by your water type.
