Since you made a list, Mark, here's mine. These would have been my winners in the Main Competition category since 2010:
2010: OF GODS AND MEN (Beauvois). Actual winner: UNCLE BONMEE WHO RECALLS HIS PAST LIVES (Weerasethakul) 2011: THE TREE OF LIFE (Malick). Same as actual winner. 2012: AMOUR (Haneke). Same as actual winner. 2013: LA GRANDE BELLEZZA (Sorentino). Actual winner: BLUE IS THE WARMEST COLOUR (Kechiche) 2014: WINTER SLEEP (Ceylan). Same as actual winner. 2015: SON OF SAUL (Nemes). Actual winner: DHEEPAN (Audiard) 2016: ELLE (Verhoeven). Actual winner: I, DANIEL BLAKE (Loach) 2017: GOOD TIME (The Safdies). Actual winner: THE SQUARE (Östlund) 2018: SHOPLIFTERS (Kore-eda). Same as actual winner. 2019: Haven't seen the films yet!
Since you made a list, Mark, here's mine. These would have been my winners in the Main Competition category since 2010:
2010: OF GODS AND MEN (Beauvois). Actual winner: UNCLE BONMEE WHO RECALLS HIS PAST LIVES (Weerasethakul) 2011: THE TREE OF LIFE (Malick). Same as actual winner. 2012: AMOUR (Haneke). Same as actual winner. 2013: LA GRANDE BELLEZZA (Sorentino). Actual winner: BLUE IS THE WARMEST COLOUR (Kechiche) 2014: WINTER SLEEP (Ceylan). Same as actual winner. 2015: SON OF SAUL (Nemes). Actual winner: DHEEPAN (Audiard) 2016: ELLE (Verhoeven). Actual winner: I, DANIEL BLAKE (Loach) 2017: GOOD TIME (The Safdies). Actual winner: THE SQUARE (Östlund) 2018: SHOPLIFTERS (Kore-eda). Same as actual winner. 2019: Haven't seen the films yet!
Our respective tastes aren't too far apart! I like your choices, although GOOD TIME wasn't my cup of tea and I'm reminded that I really, really need to get around to viewing SON OF SAUL.