I think we all have our preferences, so I limited mine to what I believe are five biggest snuffs:
1934 Cochrane over Gomez- I actually made a thread on this, but I still stand in the opinion that Lefty's performance in batter-dominated Depression baseball outweighs Cochrane's misjudged season as a leader.
1942 Gordon over Ted Williams
1974 Garvey over Schmidt, Winn, or Bench
1999 Rodriguez over Pedro Martinez
2006 Morneau Jeter
2011 gets a dishonorable mention because Kemp outclassed Braun in every way