But why would we even want to Dave ? , unless you mean that in the next few years that one of the super wealthy CL clubs come in waving huge cheques around.
Every keeper makes mistakes, the better keeper make fewer mistakes and for a keeper who is still very much on a learning curve I would say that Pickford makes as few as anybody.
Pickford has made the international spot his own without a huge media campaign championing his cause and without the impetus that playing for a top four club gives... he has done this more or less on his own.
It is difficult to compare and contrast goalkeepers because so much depends on the players around them and the team they play in , but I think Pickford would compare favourably with any of those you mentioned.