Mantequilla Napoles, by far...no offense to Kid Pambele. It was just good fortune for Cervantes that they never met.
Napoles, but not massively for me. In the Ring's 80 best of the last 80 years Napoles was 56, Cervantes 69. Such lists are often a good starting point being branching out and digging deeper.
Talented? Probably Napoles. But I'd probably rate Cervantes higher on accomplishment by a narrow margin.