Very interesting thanks. It looks from the records that he was just unlucky to also be caught between two generations of great drivers, it is hard to look good sandwiched between Ickx and Lauda! Did he have strong connections with Ferrari to start his career with them? It must have been depressing to go from Ferrari, whatever the car, to Team Merzario!
You could also make a claim for Pedro Rodriguez being equally unremembered while at Ferrari although he is of course know as a great all round driver and won for other teams. Would have been interesting to see how Ricardo would have developed.