Pop any name from this list into a google scholar search https://psychopathysociety.org/search/newsearch.asp
Also, if you can get your hands on this book you can get a pretty good summary of a bunch of studies that give a decent overview of modern understandings.
James Fallon is an interesting example of a psychopath who doesn't fit the stereotype. Andy McNab is also an interesting one to look into. Athena Walker is another one to look at. None of these should be considered experts in the field, but they are interesting examples of people whose brains function a bit differently to the standard model yet are able to live successful and happy lives.