Top Rugby Scrum Halves: Legends & Impactful Players

Question
Hi there, I'm looking for the names of the scrum halfs of all over the world in teams like, Argentina, Scotland, Ireland, England, whales, south-Africa,Australia,new-Zealand ect that had a significant impact on the game of rugby. The golden boys in the nr 9 jersey.

Answer
Famous Scrum-Halves - Gareth Edwards (Wales; arguably the greatest player of all-time), Matt Dawson (England), George Gregan (Australia), David Loveridge (All Blacks, David Kirk (All Blacks), Sid Going (All Blacks). There are more and you will notice more All Blacks mentioned as i am a Kiwi. I would look for some South Africans as I am sure I left someone out there and also France.