I'd so the best players are the guys who can go a shit team and still beat you or give you a super close game. My cousin is quite possibly that person, I would go maybe Brazil or Italy, him Saudi Arabia and i'd only narrowly beat him, possibly draw or even lose the odd game.
Now just to say, i'm not shit at the game, I can usually beat the computer in 5 star by 2 or 3 goals with an average club, with Brazil can usually hump the computer. Haven't ever entered a tourney in a pub or in Glasgow, so don't know of any names other than fmaily or friends.