Hi,

Some famous alumni of all time from IIMs are:

• Harsha Bhogle: One of the most renowned, knowledgeable and liked cricket commentator from India.
• Raghuram Rajan:  The previous governor of RBI and a prophesied saviour.
• Manjunath Shanmugam: An IIML grad who challenged corruption and lost his life trying to fight petrol mafias. He deserves to be remembered by us all.
• Ajit Balakrishnan: CEO of one of the earliest dot-com companies in India, Rediff.com (//Rediff.com)
• Arvind Subramanian: Chief Economic Advisor, Govt OF India.
• Amish Tripathi: A renowned novelist and author of Shiva and Ramachandra Trilogy.
• Chetan Bhagat: The author who introduced the concept of novels to many Indians.
• Deep Kalra: Founder of most famous travel website, MakeMyTrip
• Rashesh Shah: Founder of Edelweiss Broking Limited, a one of a kind company.
• Indra Nooyi: Chairperson and CEO of PepsiCo.

Hope it helps.