No one will ever know who is the best.
Just because one enrolls in the Pro-circuit does not make them top 25 Halo players all time.
The players who have been listed above posts actually took their time to join and create what the pro-circuit is today.
Everyone has opinions, everyone has their own way of playing, everyone has their own controller settings.
What makes a player better?
•Think. It is a strategy game.
•Be aware of your surroundings(ingame)
•Do not camp/rush campers
•Don't bomb rush. Play it cool.
•Know spawn points. Reason WHY they would spawn there and not at the other spawn point
•Know weapon-and power up(camo/overshield) respawn duration -time when it was tripped
•Past game experiences. Make their move for them.