I agree these behaviors don't seem psychopathic, merely selfish, irritating, and useless. It sounds obvious from your account that he is not being truly product

I agree these behaviors don't seem psychopathic, merely selfish, irritating, and useless. It sounds obvious from your account that he is not being truly productive. You should try to have a polite conversation with him about "prioritization" to get him to stop unnecessarily writing documentation and holding meetings (actually that is pretty weird behavior). If he is wasting his time socializing instead of truly getting work done, he'll be his own downfall. The managers might like talking to him but at the end of the day, employees who get real, important things done are most valued. Perhaps you should devise a way to make that clear to your managers, maybe by being very productive yourself and subtly putting that in contrast with his work. Also you should befriend the managers too.