Best Rapper of All Time???????

Ok peoples I have a debat on hand. I am trying to figure out who is the best rapper EVER! Yea Lil Wayne is hot now, but where will he be ten years from now? Kanye is dope, but is his style becoming too much? Jay is arguable the best alive, but where woulkd he stand if Pac and Big were still alive? And speaking of Pac and Big, who was the best out of them two. Each coast has their own opinions.

I need to know. Give me feed back!!!!!