8. Francis Ford Coppola
There is no doubting the inestimable legacy of Francis Ford Coppola's sublime work in the 1970s; with a filmography including The Godfather and its indelible sequel, as well as The Conversation and Apocalypse Now, Coppola was virtually untouchable during that period. However, over three decades later, the director has struggled to remain relevant or even particularly interesting as a filmmaker, with his most recent movies - Tetro and Twixt - struggling to receive major theatrical releases after scoring negatively with critics. Even the director's most famous post-70s works - The Godfather Part III, Dracula and Jack - were all relatively divisive, and made it clear that to simply give him an easy ride for his admittedly unprecedented run of near-perfect films in the 70s is to make him nothing if not overrated.