Harold Holt
Harold Holt, the 17th prime minister of Australia, went for a swim but never returned. He was a very good swimmer but after a major search operation was made, he was never found. At first, it was thought that Harold had either been eaten by a shark or swept out to sea. Eventually, the cause of death was ruled as an accidental drowning because the place where he went for a swim was known to be a place with strong rip currents. His body was never found.
Heinrich Muller
Heinrich Muller is one of the most degrading people of all time. He joined the Gestapo (Nazi Germany’s police) in 1033. He was a major contributor of the Holocaust. The last time he was seen was exactly a day before Hitler took his own life, on May 1, 1945. Apparently, Muller was not gonna let himself be taken as a prisoner because he knew the Russian’s methods. From that day there hasn’t been a trace of him. He is the highest-ranking member of the Nazi party that hasn’t been captured or killed.