I dropped literally everything in your list for the reasons you outlined (except WoW, which I dropped before I knew anything about Blizzard).
But Rowling is worse than them.
Corporations are amoral, and entirely self serving. They will fuck over anyone if it earns the corporation a profit.
Rowling is not amoral. Rowling is driven by hate, and her goal is not self interest, and her harm is not indiscriminate. Her harm is targeted and deliberate, and she explicitly uses her visibility to normalise and encourage harm to the people she is targeting.
And deliberate targeted hate that tries to create more hate is worse than amoral self interest.