18. John Danaher
Danaher is a different kind of crazy to others on this list. The New Zealand native moved to New York to pursue a Ph.D. in philosophy at Columbia University. He fell in love with Brazilian jiu-jitsu and became one of the leading coaches of the art on the planet. While he never competed, his teaching skills are clear because of his students’ success.
He trains the likes of Gordon Ryan, Georges St-Pierre, and many other elite martial artists. Danaher is one of the wackiest coaches because of his total dedication to BJJ. He always wears a rash guard regardless of the occasion. However, his eccentricity makes him brilliant. Few people possess a mind like his.