Lil Wayne

Wayne is the contrarian pick of the top 5—most lists bury him outside the top 10, but his influence on modern rap is seismic. His mixtape era (especially 'Da Drought 3' and 'Tha Carter III') redefined wordplay, double entendres, and sheer output, and he shaped Drake, Nicki Minaj, and a generation. Yes, his later work waned, but at his peak (2004–2008) he was the most creative rapper alive.