According to LoLking (http://www.lolking.net/champions/), the current top 10 win-rate champions in order: 1  Amumu (14.29% popularity, 55.59% win rate) 2  Fiora (7.9% popularity, 54.55% win rate) 3  Rammus (4.65% popularity, 54.43% win rate) 4  Warwick (14.46% popularity, 54.31% win rate)  Rumble (1.43% popularity, 54.17% win rate)