UK's best is Bisping who sports a 17-7 UFC record. Their other top veterans are Dan Hardy (6-4), Jon Hathaway(7-2) and Ross Pearson(10-7). Ireland has Conor McGregor and a prospect in Joe Duffy(1-1). Korea has Don Hyun Kim(12-3) and Korean Zombie(3-1) and a serious prospect in Doo Ho Choi(2-0). Japan has Yushin Okami (13-5), Mizugaki (10-7), Horiguchi (5-1). I also have to include veterans, Gomi(4-6) and Kawajiri(3-3). Australia has rising prospects in Robert Whitaker(6-2) and Jake Matthews(3-1) and a veteran in Kyle Noke (6-4). Of all time, it's between Japan and UK but I give an edge to Japan for having more legendary fighters. Currently, it's a toss up. UK has nobody after Bisping while all of the other countries have rising prospects.