Thuram was a quality CB for Parma: The argument that RCB is not CB is just not true. The main job of center backs is that of putting defence together man-marking opposition strikers. And guess what? Thuram and Canna were man-markers in Parma system backed up by Torrisi who played as a sweeper. And he did a remarkable job at that.
Just because Thuram lacks cynicism doesnt mean that he isnt a quality CB. Different players have different way of doing their jobs: Malidini for the sake of argument doesnt quite have the cynicism that characterize most of the Italian defenders such as Cannavaro, Nesta, Iluliano, Materazzi to name a few. Doesnt that mean he isnt a quality centerback? My answer is no, because Maldini has other qualities that allows him to play his style of football. Maybe, by having extra cynicism would have made him an even better defender,

, but my argument is that just because he doesnt have it doesnt necessarily mean that he is a bad defender.
Thuram has qualities to be a quality CB, he is good at heading; pretty good at battling positions; disciplined defender and werent give needless fouls; strong, and most importantly he has proven that in the past he can be a good CB. I admit he didnt enjoy best of times playing that position in Juve, but CB in 4-4-2 is all about forging partnerships and if we can find a good complimentary players a la Mexes, I see no reason why Thuram cant excel in that position. Admittingly he isnt a best CB at this moment of time but given our options, I think it is pretty safe that he wont do any worse than Iluliano, Montero, Legro did last year.
BTW, the guy who should have been left out is Bixente Lizarazu, and Silvestre should have played as a left-back. Lizarazu is totally washed up, and has very little game left now.