Player 4 wins the most as you'd expect.
The only player who isn't competitive is player 2.
I am player 1 and i play to win every game, the problem is that my armies MUST be fluffy or i have no interest in them and thus don't care about them and they get sold or never finished. I also will never spam units as i find duplication boring.
Player 2 almost never wins a game, but he just likes to play the game, so he is generally happy to plod along. He is just not a competitive gamer and so wont push to win. This is not good if your in a team with him tho lol.
Player 3 has zero attention span by his own admission and cant focus for more than a week on any one army, thus he loses big when he loses. He is competitive like me, and his constant buying of the newest and best units/ codex's allows him some wins from time to time.
Player 4 almost never paints his models, doesn't give a rats bottom what they look like (they sometimes are not even built totally). He also only uses the best units in each army EVERY time and his army build for each army remains static for years on end. This combination of repeated use of an army that doesn't change (means refined tactics), and the best optimum unit configurations, allows him to win big style lots. He either gets tabled or does the tabling.
From this you can see that being a "competitive" gamer means little, its how far you take the construction of your army that can make or break the game. GW simply doesn't care so the gamer's themselves have too. This is'nt going to change anytime soon.
We deal with it and i dare say other groups do too. We cant change ourselves or player 4's style, we just begrudgingly accept it and move on to the next game.