Queen
It seems as though being a legend in the music world wasn’t enough; pretty much all the members of “The Queen” were also literal Geniuses. Before joining the group, Roger Taylor was on his way to becoming a dentist; John Deacon had electrical engineering training; and Brian May, probably the most impressive of the bunch, has a Ph.D. in astrophysics.
While they all could have contributed a lot in those professions, arguably, they have contributed more by being the legendary Queen. Since the 1970s, Queen has sold over 300 million records worldwide, earning them the title of one of the best-selling bands in history.