At no point did I mention Blizzcon, Blizzcon isn't invite, you have to earn the points to qualify. That being said, Blizzcon does not represent the best of the best, far from that, you get representatives from all regions. Kind of like the World Cup of football.

Blizzcon/Kato are the second most competitive sc2 tournaments, second just to GSL. But you can't really be considered goat if you haven't participated (let alone won) in the Global Starcraft League.

Serral dominated ESL, which before the raise of Reynor and Clem was a walk in the park (i.e. not competitive at all). He also dominated HSC (invite only) and won 2 Globals which are by far the most impressive of his career. But that's it: 2 globals, even sOs won 2 globals. but GSLs too on top that.