On a slightly different note, Johnny Herbet is, in my opinion, one of the most highly underrated drivers of modern times.
He was touted as the best thing since sliced bread when he was younger. He had an extremely unfortunate accident that resulted in one of his feet being nearly cut off. After that he continued racing even though he practically could not heel-toe. Further misfortune hit him when he signed to Team Lotus (like selling your soul ... life contract). He still managed to sneak up to 10 or 8's, occaisionally stealing points. Rather impressive for a guy who has stiff feet and was driving a car that would last maybe 20 laps.
