Is Blizzard the Best in the industry?

[Flouff]

I may be wrong but i feel that even if you see many genres from them, they all share one component : online with a least microtransactions. That's why the won't do any single player story driven game.
I play hearthstone and might be intersted in overwatched, but i can't stop feeling they're good to find an optimised formula for each of their (great) games, but in the end the games are a little soulless