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"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.
It is doubtful that any meaningful comparison can be made between fictional characters and real people, nonetheless, in my opinion, George Washington is more famous than Spiderman.
George Washington; Washington is famous throughout the world, Michael Jordan is less well known outside the USA.
Moses
Moses is more famous.
Spiderman is more famous
Spiderman
spiderman
spiderman
spiderman..
spiderman
spiderman
spiderman
spiderman
Spiderman is more famous than Bruno Mars.
Moses