The line for greatest driver ever starts behind Juan Manuel Fangio…
From Wiki:
=> One of the most successful drivers in Formula One history, he made his debut in the inaugural Formula One season in 1950 to dominate the first decade of the championship. He went on to win the World Drivers' Championship five times—a record that stood for 46 years—and became the only driver in F1 history to win titles with four different teams: Alfa Romeo (1951), Maserati (1954 and 1957), Mercedes-Benz (1954 and 1955), and Ferrari (1956).[c]
He holds the highest winning percentage in Formula One at 46.15%, winning 24 of 52 Formula One races he entered.[2]
Additionally, Fangio also holds the record for the highest pole percentage at 55.77%, achieving 29 pole positions from 52 entries.
[3]Fangio is the only Argentine driver to have won the World Drivers' Championship and the Argentine Grand Prix.[4][5] He also competed in sports car racing, winning the 12 Hours of Sebring in 1956 with Ferrari and in 1957 with Maserati. <=
https://en.m.wikipedia.org/wiki/Juan_Manuel_Fangio