Nobody has done it multiple times. Out of all the teams that won an international event, EG and Acend were the weakest ones on paper, but EG looked hell of a let better. The improvement they had over the course of the year is insane, and even the players ascribe a lot of that success to the drills they did with the 10-man roster, which was all Potter. Out of all the teams that won, EG is the only one where you can really feel the impact of the coaching imo.