Victor Valdes is a very amazing player because not only is he a good goalkeeper, but he is nice to his team and has known half of them since he was around 6-7, but I do not know if he is the best because he makes foolish mistakes when it comes to skill. Sometimes he whiffs or sometimes he just doesn't think before he does. Here is a youtube video that shows his plays and his very bad plays that show how he does not pay attention.
This is just him at his worst now look at this one of his best.