Your question cannot be answered with the information currently available.
"More Famous" is too idiomatic for anyone 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.
Darth Vader
Darth Vader
Definitely Darth Vader
Darth Vader
britney spears= 92.9% more famous than darth vader,
Darth Vader
darth vader
Darth Vader
Definitely Darth Vader
dark vader is.
Darth Vader and Benjamin Franklin were both famous but oddly enough Darth Vader is considered to be more famous when he wasn't even a real person!
Darth Vader