If you could bring a fighter(s) from the past to this era, who would you like to see?

This thread is to think about possible matchups that could happen between your favorite fighters of all time and current champions or contenders. I would love to have Ray Mancini competing these days. A prime Camacho would be another one of my favorites that would be great to see in the current scene. I'm not looking for the usual "Who wins?" type of thread. I just want to know who you would want to have fighting these days.