Writing only two songs out of 18 singles (the albums are even more skewered to my factual and valid point), with half of the remaining being cover hints more to her being a singer who people could work with, than a songwriter. Lennon & McCartney were, are musical geniuses, Elvis the greatest showman and Michael Jackson had a great voice. Yes, the hypothetical opinion reversed, are you saying Amy Winehouse was good, or important to music as the aforementioned? They all lived longer and recorded more albums and singles they far bigger hits globally that someone who died at 27. Nirvana ended when Curt Cobain ended, as did The Doors when Jim Morrison died. Nirvana had 5 US number 1 albums to her none. The Doors had only 1 US number 1 album. Janis Joplin had 2 US number 1 albums. Joplin might be a better comparison as the Doors sold over 180 million albums and Nirvana 120 million. I wouldn't consider Joplin to be in the same bracket as the others and would say Amy Winehouse had a nicer voice. As you said that's an opinion.