Nope. Jimmy Slattery was the most talented. He rarely trained and usually fought either drunk or hungover. Won the light-heavyweight championship twice. Imagine what he could have accomplished if he had taken his career seriously.
Jones Jr. is by far the most talented in terms of physical talent of all time, he was absolutely amazing. I have never seen anybody as good as a prime RJJ in action. Tyson at HW comes very close.
Roy Jones Junior Floyd Mayweather Sam Langford Sugar Ray Robinson Roberto Duran Muhammad Ali. In no particular order, these would be my picks for raw talent. Duran is borderline.
If you gave Thomas Hearns a chin he would be the greatest prize fighter of all time. He destroyed Ray Leonard for 12 rounds of their fight.
I do not know how you can say that SRL is one of the best that you have seen when Hearns dominated him in there first fight and the only reason Ray won was because of Tommy's chin.
pep - apparently rarely ever trained, and won a round without throwing a punch.. if thats not talent i don't know what is.