Is Blizzard the Best in the industry?

[Hynad]

WoW killed Warcraft for me, so no.

More seriously,  I'd say they're among the best in the industry (along with the likes of Naughty Dog, who have made 4 pretty different franchises and nailed each of their respective game genre). Blizzard's games are always greatly polished and of quality only a select few matches in the industry.

But I think they've lost a lot of the energy and originality they had during the 90s.