Michael Laundrup deserves to be there. Best playmaker i ever saw. He could create goal chances almost at will, and make it look effortless.
That being said, i vote for Zidane. A truly complete player, not much else to be said. Excellent in all aspects of the game, as well as physically, professionaly and he had a knack for performing the best at tough matches.
I respect Messi, but he is way overrated.
List is lacking a bit in defensive players, so just for variety i'll put a extra vote in Buffon as GK, Cannavaro as CB. Italian defense at WC 2006 allowed only 2 goals in - first was own goal, and the second one was wrongly given penalty after dive from Henry. As much as I dislike defensive football, thats just unbelievably impressive performance and i always thought it deserved some special recognition.