Jean-Pierre Jabouille entered 55 Grands Prix. He won two, finished fourth once, and only classified as a finisher in 5 other races, never in the points. I suspect he has the highest finish to win ratio
Between 1966 and 1979 Jacky Ickx drove for every team that won the world championship during that period. Tyrrell / Matra, Ferrari, Brabham, McLaren and Lotus. He always arrived or left just after or just before they won a world title.
Lela Lombardi is the only woman to finish a GP in a position to score points. However, this was the shortened 1975 Spanish GP at Montjuich Park, and as she finished 6th she only got half a point. So, still to this day, no woman has scored a point in an F1 race.
From Pre-Qualifying for the Spanish GP on the 29th September 1989 to their final entry at the Australian GP on the 31st October 1991, the Coloni formula one team failed to qualify for a staggering 34 consecutive races.
In the days when the points towards the constructors title were only scored by the highest finishing car, Team Lotus achieved a feat that will almost certainly never be equalled.
The team won the 1972 Drivers and Constructors titles with Emerson Fittipaldi scoring every one of his team's points.
His team mate, Australian David Walker remains the only teammate to a world championship winner never to score a point in the same season. His best finish was 9th.
Probably runner up in this category, post 1977 when two cars counted for points, it must be Nelson Piquet's 1981 teammate Hector Rebaque who only managed to finish in the points on four occasions and even failed to qualify the car once. While Derek Daly, Keke Rosberg's 1982 Williams teammate only scored 8 points compared to Rebaque's 11, Daly only arrived at Williams from the 5th race of the season, finished in the points on 5 occasions and qualified the car for every race.
The only time that John Surtees in 1964 and James Hunt in 1976 were at the top of the world championship points standings was crossing the line on the last lap of the last race of the season. Until then, neither had led the standings at any point of the season.
Furthermore, due to only the best 6 results counting towards the title, in actual fact John Surtees is technically the only driver to have won the formula one world championship without ever having led the points standings at all. He finished on 40 points but Graham Hill finished on 41 only to have to drop 2 points to finish on 39 due to the best six races rule.