New York, Jan 26: ; The Brand Finance Brand Guardianship Index just in has ranked Microsoft boss, Satya Nadella, as the top CEO in the world.Nadella, a first-generation Indian immigrant to the US, "has been credited with overhauling Microsoft's fortunes by changing its culture towards one of teamwork, innovation, and inclusivity, and instilling a growth mindset throughout the business".Three other Indian-origin expat CEOs rank high: Sundar Pichai of Google is at 5, Shantanu Narayan of Adobe at 6, and Puneet Renjen of Deloitte at 14.N. Chandrasekhar of the Tatas is at 25 in the list and Anand Mahindra of M&M…