I am going for Freddie Foxxx, he is a beast, in a straight up fair fight I think he would destroy any musician currently working (I just hope N.O.R.E. doesnt carry out his threat to shoot him the next time he see's him
...)
Honourable mentions gotta go to:
Joseph "Fat Joe" Cartegena
Billy Danzini
RBX
The lead singer of Pantera (Phil Alsemo?)
Raymond Benzino
Vinnie Paz
Jadakiss
Beanie Seigel
Dave Mustaine
And Suge Knight, or any other criminals who work for record companies dont count... Im talking about people who actually make music!