I don't think many people think less of Keke Rosberg for winning the title in '82, and he didn't get his sole win until the 14th round of the season. Even then, he only took the lead from Alain Prost on the last lap or so - Had he been 2nd, he would still have won the title.
Whilst there were some extenuating circumstances that year (Villeneuve [RIP] and Pironi's accidents, and FISA/FOCA war meaning only a few cars raced at Imola), it's not unreasonable to think that the 19 races this year could be spread out thinly across the top 7 or 8 drivers, with a dark horse thrown in also.
If anyone is going to win without winning a race, I'm looking at the young floppy-haired German in car number 4. What's his name again?