I want to know the answer to the following question:
Who said Kanye West was the greatest hip hop artist of all time?
All the background I'm provided with is that "The Guardian has compared West to David Bowie, arguing that "there is nobody else who can sell as many records as West does (30m-odd album sales and counting) while remaining so resolutely experimental and capable of stirring things up culturally and politically."". Is that enough to answer the question?