Yep, Elford is one of the most complete motorsport drivers ever. Besides winning ERC (the most important rally series at the end of the 60's), he also won several endurance courses and got into F1. Two nice videos about him (the second is an interview telling how he managed to persuade Porsche to get the 911 into rally).
https://www.youtube.com/watch?v=WTJWewNACsg
https://www.youtube.com/watch?v=FdFWht1UD08
Btw, several French rallymen (Andruet, Frequelin, Ragnotti, Beguin, etc) also had illustrious racing experiences, long before those of Sarrazin and Loeb.