Rexy Mainaky (Joint Sabah/Malaysia Heritage)

Rexy Mainaky, with Sabahan heritage, transformed Malaysian badminton as the most successful coach of doubles players in the modern era, producing a 2019 World Championships gold medal. His coaching tenure since 2016 elevated Malaysia's men's doubles to world No. 1 for 8 cumulative months, a 40% performance boost compared to predecessors. His protégé, Aaron Chia, clinched bronze at the 2020 Olympics, outpacing #5 Punch Gunalan's coaching record of a single bronze in 1992. Rexy's strategic innovations, including a 70% net play efficiency rate, redefined Malaysian doubles style, making him a cross-border legend comparable to top Indonesian coaches like Tony Gunawan, but with a uniquely Malaysian impact.