Who is the wordls best butterfly champian?

As of my last update, the title of the world's best butterfly swimmer is often attributed to Michael Phelps, who holds multiple Olympic and World Championship titles in the butterfly events. His record-breaking performances, particularly in the 100m and 200m butterfly, have set a high standard in the sport. However, in recent years, swimmers like Caeleb Dressel have also emerged as top competitors in butterfly events. Rankings can change frequently, so it's always good to check the latest results for the most current champion.