Mack, Hopkins, and David Jacobs all developed strategies for identifying people who they believed were dishonestly inventing yarns regardless of motive (whether consciously and/or unconsciously).
The stories of some publically-known people (like John Ramirez, Jim Semivan, and Garry Nolan) hang on their reputations and general credibility. I might add that the stories of Ramirez, Semivan, and Nolan are only incidental to their contributions to the "UFO/visitor" narrative and just provide interesting backstories.
What is reeeeeely interesting are the events that are said to occur at Chris Bledsoe's property down in North Carolina (mostly orbs, visitations, and high-strangeness in general). They have been witnessed by many other people and these people have gone on record.
Ray Fowler did a series of hypnotic regressions on Betty Andreasson that really raised my eyebrows. Her account was very detailed; and, she now sees the ETs/whatever as benevolent. Very weird, however. A disturbing aspect was the ET claim that they strongly influenced our creation and ongoing maintenance. It has been many years since I read either the “Andreasson Affair” or “Watchers”, both related to Betty Andreasson.