the French Foreign Legion (feared worldwide - much more than the SAS/SBS).
Just in case you decide to come back SAM, where on earth do you get these half cocked ideas from?
The Legion is a highly respected fighting force, comparable with British RM Commandos, USRangers, Australian Commandos etc. The only part of the legion that could, perhaps, in part be compared to the SAS/SBS is their Pathfinder unit. You cannot compare apples with oranges.