Large orienals take a long time to mature. They will fight as chicks then wait till they are much older in my experience before they commit to not allowing other males around This big boy is 6-7 months old and and still gets beaten by most the chickens just like his dad but once mature game...
definatly oriental breeds thai,ganoi,or shamo. if of small size like American or smaller then aseel would be it altho there are bantam shamos or ko-shamos