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Yes, what I meant was cocks would need to be separated. Another thing is the Oriental Games (Shamo, Malay, and Saipan junglefowl) aren't real cold hardy (though my Shamo did fine with snow and such last year, just made sure he wasn't hit directly by wind). Malay's are the biggest birds of which, reaching over three foot more commonly and weighing closer to around 15 pounds (give or take a few pounds, all depends. Ronnie Profitt's birds are probably the largest chickens in the United States, however, they're around 1500 dollars). And a lot of the Malays I would say, aren't real gamey anymore and could probably be kept together especially if bought from show strains. 
For a more gentle, yet large breed I would probably go with Brahmas myself. I find them more appealing than any of the other breeds (Jersey Giant, Orpington) and they're closer to the Malay, giving them more height and a large weight as well if I remember correctly. Not to mention, far more rare and handle the colder temps better than a large single combed breed. But that is just me 
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No offense taken on the Shamo comment, most people tend to think that. I even thought they were ugly for a long time, but they grew on me the more I learned of them.
-Daniel
ETA: I actually forgot about the Langshans, those are pretty good too. I've had some hatchery stock before, and even they were quite large too.