Who directed '1917' (2019)?

Who directed 'Blade Runner 2049' (2017)? Who directed 'Saving Private Ryan' (1998)? Who directed 'Platoon' (1986)? Who directed 'Full Metal Jacket' (1987)? Who directed 'American Beauty' (1999)? Who directed 'There Will Be Blood' (2007)? Who directed 'The Social Network' (2010)? Who directed 'Slumdog Millionaire' (2008)?