Fred Thompson is probably best known for playing an airport administrator in 'Die Hard 2.'
As for Ronald Reagan, he was essentially known as a second-tier leading man for the studios during the 1940's. A good curio to check out is his last acting gig in Don Siegel's 1964 film 'The Killers' (itself a remake of a 1946 film with Burt Lancaster). I think it's one of the few times in his career that he played a villain. It's not great (the earlier film is far superior), but it's got Lee Marvin, John Cassavetes, and Angie Dickinson, so it's not all bad.