To be honest, I'm not well versed in the gamefowl breeds beyond the very common ones, and a few others that I've seen in passing. I've only had experience with owning Old English Game bantams and I'm not sure they really count, as delicate and small as they are

But I love them to bits, my precious, cute, tiny birds

I also am absolutely in love with Modern Game bantams, though I don't own any (yet) and they're pretty delicate and small like the OEGBs, too. I lean more toward itsy-bitsy tiny birds more than large fowl these days, so my tastes tend to be for the more decorative game breeds than the big, imposing ones.
But I do love the look of Flarry-eye Greys and Liege Fighters, and there are some truly gorgeous true Cornish Game varieties