100% the best ever. Last minute equaliser away to your rivals after looking down and out with ten mins to go? Yup.
Winner in the replay against your rivals by a player that they released? Yup
Picking ourselves up and winning the quarter final replay away at a ground that we have an awful record at 3 days after we were sucker punched in the last minute of the league cup final that we dominated? Yup
Winning the semi final on penalties with a hero goalie who hadn't played in 18 months? Yup.
More last minute heartbreak just days before the cup final in another tie that we deserved to win but didn't? Yup.
Winning the cup final after being 1-0 up, thinking the unthinkable, going 2-1 down and thinking here we go again, equalising with ten minutes to go and then have your captain score a last minute winner to win the cup and break the countries most famous football hoodoo? Yup.

The only time I can imagine another teams set of fans have felt that kind of emotion that we did would possibly be the season Man City won the league with two late goals. Other than that I can genuinely say I doubt any fans anywhere have or will felt that level of joy that we did when Gray headed home.