Rudy Foggia was yet another alias for Randall Flagg
While he may have been "real, or myth, or (most probably) a combination of the two," Rudy Foggia is described in "The Jaunt" as a convicted quadruple murderer and the first (and possibly only) man to go through the Jaunting process awake. He drops dead moments after coming out of the portal, his hair snow-white, uttering the cryptic phrase "It's eternity in there." So, a guy whose initials were R.F., who committed a terrible crime, participated in an historic event, and died a spectacular and horrifying death. Rudy Foggia meets the criteria for being a possible alias for the creature known as the Walkin Dude
, the Man in Black
, Randall Flagg.