From Wikipedia...

Today, many philosophers limit evil to acts that intentionally cause harm.

This is rather the definition I generally apply to the word. However there are, it turns out, many definitions to the word 'evil', and it is therefore pretty darned difficult to hold a conversation on the good/evil nature of a "corporation".

Regardless of one's definition, applying the word evil to a business or corporation seems to me to be at the very least, an attempt to apply a sense of moral obligation to something that is intrinsically amoral. Not immoral, but without-morality. This morality-assignment, is therefore forced and unnatural, and will ultimately be unsuccessful.

So I say, get over the noise that corporations are behaving against human morality. It's a red-herring that distracts from getting a "fix" in place. Accept the intrinsic amorality of corporations, and focus instead on getting that which is moral, the human constructs of government, to establish constraints (unnatural to the corporation) on the corporation. Make laws and enforce them. Don't chase the utterly toothless argument that corporations are immoral bastards who "should do better".