Brazil Russia Argentina Korea Canada and USA are the only good contenders.
it would be kinda unfair to just have all of loud and all of DRX represent their country. if there ever actually was a world cup it should be max 3 or 2 players on the same roster per country
now that i think about it, russia would probably win with the rule i mentioned above. since all the gambit/M3C players are all on different teams so this rule wouldnt apply to them