Jack Chick is a good source for some amusement. Alberto Romero Rivera was just one of them. You left out John Todd, supposed ex Grand Druid high Priest, and Dr. Rebecca Brown MD. i really hope that somebody in the Christian Community (either or both Catholic and Protestant), does a book on all of these theories.
You know, we haven't even gotten to the shortwave wackos yet.
I'll admit it was first at Jack Chick that I heard about Alberto Romero. At first I thought that he was a made up character for their comic "Crusaders" series, but after some research, I have found that he was a real person.
Weather or not Alberto Romero was wacky, I don't know. My research has shown that he did exist, he did tour various colleges and churches, and that he did talk out in regards to a "Black Pope" as being the real power behind the Catholic Church.