How do you overrate someone who's won 4 titles, 52 races, and amassed 800+ points? True, he hasn't the ethics of Fangio, or maybe even the car control of Jim Clark. No, he wasn't as religious as Senna, as humourous as Piquet, or as media-friendly as Prost.
However, he actually has some feeling in him, and turining around a Ferrari team that hadn't won a constrcutor's title in 16 years is really something else. Benetton were in a bit of disarray until they made him sign a contract in late 1991.
Nobody likes a driver that wins all time...true, but please save it! Senna and Prost could make racing really dull at times. But give all of them them a challenge, and they would deliver!