biography of great businessmen

Today as I am reading a blog post which I have been trying to read for a month, I got to know few interesting things about some Indian businessmen.:

• Do you know that Ratan Tata is a Life Long Bachelor?
• Do you know that SunilBharti Mittal was rejected for Maruti Dealership on the ground of lack of Financial resources to run the business?.
• Do you know That Subhash Chandra of Zee had a good argument a Hong Kong based Satellite operator when they rejected him.
• Do you know that Mukesh Ambani created world’s biggest petro refinery in shortest time?
• Do you know the journey of Uday Kotak?
• Do you know about Anil Ambani’s grit and determination when he lost some 25 KG of weight in few months?
• Do you know the epic battle of Nusli Wadia with his father who wanted to sell Bombay Dying?
• Do you know about struggle of Dhirubhai Ambani ?
• Do you know that Vijjay Mallaya failed in approx 10 business? Do you know about Anu Aga ? Do you know about Gulu Mirchandani ?

This gave me more curiosity to know the life of these guys. So I have decided, I'll read about these guys, collect information about them and will share the information in a blog. I'll take one personality at a time. will do full case study about him.
So, with whoome I should start with?
May b Ratan Tata or Dhirubhai Ambani.
Let's see how I do about this.