Not all people who do great work are great people. In fact, I suspect a negative correlation.

For a current example, see Elon Musk. Even here on a relatively level-headed hacking forum, any discussion of Musk will turn into poo-flinging between fanboys that worship him and haters who deny that success of his companies has anything to do with him.

Great person does not imply good person. My comment was about great people

Interesting. "Great person" is tough to design.