António de Oliveira Salazar (1889 - 1970) effectively functioned as the ruler of Portugal from 1932 to 1968.
... Stewart[?], (United Kingdom) 1974 - Ronnie Peterson[?], (Sweden) 1975 - Niki Lauda, (Austria) 1976 - Niki Lauda, (Austria) 1977 - Jody Scheckter, (South Africa) 1978 - ...