There has also been academic interest in exploring with narcissistic leadership types and their impacts. Here is a review of other studies examining these and impacts, frameworks for future studies etc. [2]
[1] - https://en.wikipedia.org/wiki/Psychopathy_in_the_workplace [2] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5437163/
[0] https://link.springer.com/article/10.1007/s10551-007-9447-8
I do wonder if there are truly good people as CEOs of big companies and but truly good I mean people that would be recognised as such by most people that have worked with them/for them
In any case, I'm not sure that the market is the best judge of what a good CEO is, with its near constant fixation on the very short term.
I bet Bill Gates was well aware of the fact that traits such as narcissism are overrepresented at the top of companies, and so was able to make a better choice armed with that information.
I do think he's doing the right thing, but I could also see an argument that he's "ruthless" when it comes to driving Microsoft in the way he sees best.