A list of some players Rob Mackenzie has had a role in scouting:

• Jamie Vardy
• N’Golo Kanté
• Riyad Mahrez
• Heung-min Son
• Toby Alderweireld
• Ollie Watkins
• Emi Martínez
• Matty Cash
• Bertrand Traoré

Pretty good CV.

This article from 2014 is worth a read: https://www.skysports.com/football/news/11662/9484649/the-science-of-scouting-changes