Jochen Rindt: 1970

Karl Jochen Rindt is the only driver to posthumously win the F1 World Drivers' Championship in 1970, after being killed in practice for the Italian GP. In 1965 he won the 24 Hours of Le Mans race, driving a Ferrari 250LM. He had 6 GP wins from 62 GP entries to his credit and achieved 10 Pole Positions.
Jochen Rindt made his F1 debut for Rob Walker Racing Team in the 1964 Austrian GP. Rindt was noted for being an exceptionally fast driver with superb car control and reflexes. He clinched the first GP victory of his career in the United States GP. Jochen Rindt finished that year with 22 points, giving him fourth place in the World Drivers' Championship. At the time of his death, Rindt had won five of that year's ten GP and had a strong lead in the World Drivers Championship. So, Karl Jochen Rindt became motor racing's first posthumous World Champion.
Jackie Steward: 1969, 1971, 1973

Sir John Young "Jackie" Stewart is better known as Jackie, and nicknamed The Flying Scot for his fast driving skills. He competed in 100 GP between 1965 and 1973, winning three World Drivers' Championships in 1969, 1971 and 1973 and won 27 GPs and holds 17 Pole Positions. He also competed in Can-Am. Between 1997 and 1999, in partnership with his son, Paul, he was team principal of the Stewart Grand Prix F1 racing team.
Emerson Fittipaldi: 1972, 1974

Emerson Fittipaldi is a highly successful Brazilian automobile racing driver, winning championships in both F1 and CART, and the Indianapolis 500 twice.
Fittipaldi hold 6 Pole Positions, 14 GP titles from 149 GP entries. He was then the youngest to win World Drivers' Championships at 25 years and his second championship title two years later. Thereafter, he sank to the bottom because of a disastrous career move and he took retirement from F1 racing in 1980. Yet his status as the youngest ever title-winner remains intact and he was the inspiration for the influx of Brazilian drivers that followed him into F1 racing.
James Hunt: 1976

James Hunt had to his credit one World Championships, 92 GP entries, won 10 GP and 14 Pole Positions.
Hunt was noticed as a fast driver with an aggressive, tail-happy driving style, but one prone to spectacular accidents, hence his well-earned nickname of "Hunt The Shunt." Hunt began his racing career in Formula 3 and entered F1 in 1973. In his first year with McLaren, Hunt won the World Drivers' Championship in 1976. Despite his F1 career only lasting six seasons Hunt remains one of the few drivers of the era to be widely remembered amongst the general public.
Mario Andretti: 1978

Mario Gabriele Andretti was the World champion in 1978. He is one of the most successful Americans in the history of the motorsports. He is one of only two drivers, the other being Dan Gurney, to win races in F1, IndyCar, World Sportscar Championship and NASCAR. He also won races in midget cars, sprint cars and drag racing.
Till date, he remains the only driver ever to win the Indianapolis 500 (1969), Daytona 500 (1967) and the F1 World Championship and along with Juan Pablo Montoya, the only driver to have won a race in the NASCAR Sprint Cup Series, F1, and an Indianapolis 500. No American has won a F1 race since Andretti's victory at the 1978 Dutch GP. Mario Andretti had 109 career wins on major circuits. He also has 129 GP entries, 12 GP Wins and 18 Pole Positions against his name.
Jody Scheckter: 1979

Jody David Scheckter is the first South African to win the World Championship in 1979. He won 10 GP and is credited for having 113 GP entries and 4 Pole Positions.
In 1970, he won the South African Formula Ford series and with it the Driver to Europe scholarship. After moving to Britain, Jody Scheckter debuted in F1 at Watkins Glen in 1972 with McLaren and finishing at the 9th place. In France, he almost won in his third start in F1 before crashing into Emerson Fittipaldi.
Jody Scheckter: 1979 (cont...)
In his next start, the British Grand Prix at Silverstone, Scheckter was involved in a big accident which took nearly a dozen cars out of the race. Scheckter's McLaren M23 bore the number zero during the American and Canadian Grand Prix of 1973. Scheckter is one of only two F1 drivers to compete under this number, the other being Damon Hill.
Jody Scheckter's consistent finishes, with three wins among them, gave him the driver's championship in 1979. However, he struggled very badly in his 1980 title defense, even failing to qualify for one race. After only managing 2 points, Scheckter retired from the team and the sport.
Alan Jones: 1980

Alan Stanley Jones was the first driver to win a F1 World Championship with the Williams team, becoming the 1980 World Drivers' Champion. He is Jones is also the last Australian driver to win the Australian GP, winning the 1980 event at Calder Park Raceway, having lapped the field.
He has 116 GP entries, won 12 GP and holds 6 Pole Positions in his racing career. He earned his first full-time F1 drive in 1976, in John Surtees' racing team. Surtees dropped him after that year and Alan Jones was racing in America when the Shadow team named him as a replacement for Tom Pryce, who had been killed in a freak racing accident in South Africa. He made the most of the opportunity and won at the Österreichring for his maiden victory, finishing seventh in the championship.
Jones won seven races in 1980, although the Spanish GP was later removed from the championship and the Australian GP was a non-championship race, so only five counted towards the Championship. Throughout the season he had a car which consistently made the podium, and he achieved ten during the year.
Keke Rosberg: 1982

Keijo Erik Rosberg nicknamed "Keke", is a Finnish former racing driver and winner of the 1982 F1 World Championship. He was the first Finnish driver to compete regularly in the series.
Keke Rosberg had a relatively late start to his F1 career, debuting at the age of 29. Rosberg earned his first victory in the Swiss GP in 1982. Rosberg's first memorable season came in a year where no driver won more than two races and consistency won Rosberg the Drivers' Championship. Keke Rosberg's pole position-winning lap at that year's British Grand Prix stood as the fastest (highest average speed) single lap in F1 history until 2001. Keke holds 5 Pole Positions, 128 GP entries to his credit and won 5 GP.
Niki Lauda: 1975, 1977, 1984

Andreas Nikolaus "Niki" Lauda is a three-time F1 World Champion. Niki Lauda has the reputation of 173 GP entries, won 25 GP and has 24 Pole Positions.
Niki Lauda bought his way into F1 racing and very nearly paid for it with his life. He recovered from a fatal accident to what the medical profession called sheer force of will. His astonishingly quick return to the cockpit was called the most courageous comeback in sporting history. After winning two championships in 1975 and 1977, he got bored and left the sport, only to return again and win another in 1984. During his remarkable career he was called both a hero and a villain. The battle-scarred champion who defied both the odds and convention remains a living legend.
Nelson Piquet: 1981, 1983, 1987

Nelson Piquet Souto Maior was F1 world champion in 1981, 1983 and 1987. He is one of eight drivers to win three or more world championships, the others being Jack Brabham, Jackie Stewart, Niki Lauda, Ayrton Senna, Alain Prost, Juan Manuel Fangio and Michael Schumacher.
On the advice of Emerson Fittipaldi, Nelson Piquet heralded the start of a long and successful career in F1. He was never a dominant driver but a crafty expert in winning by stealth, according to his detractors. Together with the Brabham team, including team boss Bernie Ecclestone and chief designer Gordon Murray, he became a consistent challenger for the world title, and was the first driver to win the F1 title with a turbo engine in 1983. Nelson Piquet has to his credit 207 GP entries, 23 GP wins and 24 Pole Positions. He was inducted into the International Motorsports Hall of Fame in 2000.