One of the players I would like to see redone is Kirby Puckett.
Probablem with pictures for him is that you probably cant find one of him not smiling. Hopefully his longtime goatee would be in the pic as well.
By the way, I should add that I have very much enjoyed all the facegens that have been added by everyone involved. Even with the disappearing quirk, I much prefer these over photos of the players.