Answer by Rajeev Mahajan:
1. He may not be the greatest Indian but he is one of those who has been the part of creating the greatest companies.
2. He was the founding CEO of Sun Microsystems, the company which later created Java programming language and NFS system
3. Later he funded Larry Page and Sergey Brin, for creating "Google"
Google came at a time when a lot of search engines were already present and Yahoo search was dominating.
And nobody cared about funding an idea which was already present.
Yet it was him who laid confidence on Page rank algorithm and could foresee it's potential.
He is Vinod Khosla