Raoul Wallenberg wasn't what you'd call a dissident criticizing communism, and was mostly known for saving Jews from the Nazis by offering them Swedish protecte

Raoul Wallenberg wasn't what you'd call a dissident criticizing communism, and was mostly known for saving Jews from the Nazis by offering them Swedish protected passports. Officially he was arrested by the Russians for espionage in Budapest in 1945, during the war, with later reports suggesting he was actually involved in an espionage effort. He allegedly died in prison a few years later. There were claims that he was sighted in prisons and psychiatric hospitals as late as the '80s but if they're true then this certainly wasn't used as a cover, he was already claimed dead. The psychiatric ward angle doesn't really make sense in these circumstances, there's no need for a cover story when the official story already sounds like a cover, and even presumably legitimate.