I wasn't measuring success based on their road going counter parts, more so their popularity. Although loeb is on paper the greatest rally driver, he is certainly not the most popular, and hence doesn't have the same marketing appeal as some of the other greats.
Fact: Loeb is the most successful driver of all time
Opinion: Loeb is/isn't the best driver of all time
Fact: Loeb is the most successful driver of all time
Opinion: Loeb is/isn't the best driver of all time