The following is speculation, and my own opinion.
Al Malnik - No. Don't know much about him other than the rumored Mafia connections.
Kenny Ortega - No. There are too many inconsistencies in what he says about Michael's condition. He says Michael was absolutely fine. He also says he was worried about Michael's not eating enough, and cut up his food for him. This worries me.
Karen Faye - No. If she has something to say she should go to the authorities, not just blog about it. The release of the crypt photo was very sketchy, and so on.
Frank Dileo - No. Too many inconsistencies. Either Marlon did, or did not, tell him that Michael was not feeling well. Frank denies that he did. WHO called Frank to tell him that Michael had died, and when? There are inconsistencies about how he got the news. He appeared suddenly after not having worked for Michael for many, many years. Why? He said, "I'm Michael's manager in life and in death." His "employer" died, and there are executors to take care of the estate/business deals. Therefore, WHAT did he mean by that statement? He has connections with Sony. How long did he have these connections and when did he go on the Sony/ATV board? Too many questions. . . .
Jesse Jackson - Yes. I have no reason not to trust him.
Shana Mangatal - Not sure.
Miko Brando - Yes. A longtime friend, and worked on the road-crew for tours.
Brett Ratner - Yes. Seemed to genuinely care about Michael.
Chris Tucker - Yes. Same as Brett Ratner.
Elizabeth Taylor - Absolutely yes. She has always been supportive and has behaved with dignity.
Brooke Shield - Yes. She seems to have genuinely cared for him.
Beyonce - I have no idea.
Basically, the ones I trust are those who didn't work for or with Michael, and had no financial agenda. Brett, Chris, Brooke, and Liz seem beyond reproach and were genuine friends. Not sure about Jesse Jackson, but I doubt he was a close friend. Miko worked for Michael, but primarily. . he was his friend.
Ortega I do not trust. I didn't like the way he interacted with Michael in the TII film. Michael was usually the one in control of rehearsals, and this seemed different. If a person is in perfect health, then one does not have to worry about cutting up food?
Frank I do not trust at ALL. Michael severed their relationship many years ago. The time surrounding Michael's death was very chaotic, with apparently multiple managers. Frank was the last manager standing. HOW can he be "Michael's manager in death?" The estate executors are in charge of making business arrangements/deals, NOT Frank. Therefore, what is his financial interest in Michael, and why?
Karen Faye was a very bad "friend." If she had concerns about Michael (and she has said she did), she should have done something about it, when she could have. And not cash in later with a book. . . . . .