Who is more famous Thomas Edison or Sonic the Hedgehog?

Answer 1

"More Famous" is an arbitrary concept. There is no way to properly gauge which one is known by a majority of the general public without doing extensive polling.

Since that data does not exist any answer provided by the participants of this site would only be opinion based and not a substantial answer.

Answer 2

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.