Bob Marley is more popular. Even after his death - 26 years ago, he has an ever growing fan base that is spread throughout the world. Every year in several countries there are tributes to Bob Marley around his birthday. The man was THE reggae king, freedom fighter and some even see him as a rasta prophet with a message of peace & unity. Marley has a greater fan following, even in death that Michael Jordan will never have.
Your question cannot be answered with the information currently available.
"More Famous" is too idiomatic to provide an adequate answer without poll data from various areas & age groups, perhaps even from different socio economic groups.
Without any data of this sort there is no way to really determine which person is more widely known to the general populace therefore any answer would really be speculation, opinion and/or conjecture from the individual who answered.
definitely michael jordan
Michael Jordan
Michael Jordan easily
Michael Jordan I think is more famous!!
It's a close call, but Michael Jordan is more-identifiable, even in the shoes everybody has.
Michael Jordan
Usian Bolt is more famous than Michael Jordan and a much, much better athlete, especially on track.
MichaelJordan
lebrob james
There are many places one might go to learn more about the famous Michael Jordan slam dunk. In addition the official NBA website, one might also try the Michael Jordan website.
Michael Jordon of course you noobs
personaaly their both good