Hulme F1

To give you some ideas:
Mike Hawthorn
Phil Hill
Denny Hulme
Jody Scheckter
Keke Rosberg
Mansell
Damon Hill
Jacques Villeneuve.

God thank you, a question that does not Lewis Hamilton. Get Wait bored questions worth answering.
I set the Hawthorn list because he was the only original member of the Ferrari team to survive the 1958 season and it was good enough a factor to enter the Ferrari team in the first place (not easy for a non-Italian at the time).
Phil Hill is just off the top of the list, he not only had the best car, but his teammate Championship leader was killed before the end of the season, giving him the title on a plate. He has only won three races of his career, and one of the UK teams did not appear and it was a Ferrari 1-2-3-4-5.
Denny Hulme was really underestimated, even during his career. Ok, it was not a great of all time, and he won his title with a reliable (he finished every race but two in the points and has won twice, while Clark has won four times, but only finished 6 races throughout the season). Still not the worst in this list.
Scheckter was the right place at right time, had a fast car, reliable, has not made too many mistakes, honest with a partner (who honored their contracts No1/No2) has not tried to pass at Monza where they finished 1-2 to win the drivers' title and constructors. Not great, but at least he has won more races in his career than most drivers in the list.
Rosberg was lucky in its title by having the most reliable car in a year when the fastest often did not finish. Accident-free Pironi Rosberg would be just the answer to a quiz question on obscure Monaco 83 or Dallas 84.
I'm misanthropic Mansell, AWS is really the luckiest driver in the world to get the best car for so long. He only won one title with a benefit to the car bomb and no team competition. But without doubt the best driver in this list, but.
Damon Hill was lucky in that Schumi himself a competitive disadvantage with Ferrari for the season and Villeneuve was not quite up to speed. Otherwise, it is a companion, not even as good as his father (who was probably the champion in the history of many talents).
Villeneuve is another who suffers from comparison with his father, but he was better than Hill. Perhaps many people have chosen to answer this question because they do not remember the other drivers?

To summarize, I would go for Phil Hill. Lucky more than once. Damon Hill Rosberg second and third.

Alan Jones

Not bad drivers win championships. Talking about the world's best drivers and the difference between the first ten of about tenths of a second, even if a driver has won a championship one, it is still a worthy world champion.

Good question, but I can choose from a prospective misconduct?

If I can, Mansell is! A mustache !!!!!!!!!
"Cheats and grasses,
Do beards and mustaches ....."

Emerson Fittipaldi won it 1974 Nationality: Brazilian Car: McLaren M23 Ford / Cosworth

Jacques Villeneuve.

Maybe your question should be reformulated, changing "worst driver" to one deserving driver and probably would be Michael Schumacher in 1994, when he won the title by a single point of Damon Hill.
Some of us remember very well the details of his visit with Hill, halfway around the track in the turn of the 36th season finale, the Australian Grand Prix in Adelaide.
Both drivers got out of the race and Schumacher was crowned champion by virtue of one-point lead he had before the race.
However, if I am to answer your question in its original form (and I should not have changed), so I will suggest Nigel Mansell a.