#2 Chris Jericho vs. Cody
The stakes were high here. After a masterful build, Cody added the stipulation that he would never compete for the AEW title again if he lost this match. A perfect character-driven story, Chris Jericho resorted to strategem after strategem that gradually wound Cody down in a war of attrition. Cody had the youth and stamina advantage, but Jericho was outsmarting him at every turn.
The ending still shocked everyone though. MJF, in a fit of "concern," threw in the towel as Cody was trapped in the move formerly called the Walls of Jericho. Jericho thus retained, but Cody's heartbreak didn't end there, because MJF executed the turn everyone but him knew was coming.
So MJF cost Cody the title, the right to challenge for it, and a friendship.
I think the turn came too soon, but it was still masterfully executed and will no doubt go down as one of AEW's most notable moments of 2019.