James B. Lee Jr., a Vice Chairman of JP Morgan Chase, died at the age of 62. The American investment banker died of a heart break after completing his workout at his home in Darien, Connecticut.

Lee, known as Jimmy, acted as the behind-the-scenes adviser to the world's top corporate chieftains, hatching mergers and public offerings for companies. He had a brief presence in the lives of business magnets like Rupert Murdoch of the News Corp. and Jeffrey Immelt of General Electric.

He was among the bankers on Wall Street who were trusted advisers to corporate America. He was quite a jolly person, who used to call clients on regular basis and addressing emails as 'your pal'. Lee was an early pioneer of syndicated loans and became an influential personality when it came to the world of leveraged buyouts and private equity.

He has financed deals for Henry Kravis of Kohlberg Kravis Roberts, Stephen A. Schwarzman of the Blackstone Group and late Theodore J. Forstmann of Forstmann Little. He was famous to go to lengths to impress a client. To cite an example, he bought a Corvette ZR1 to show his dedication to GM during its initial public offering.

In JP Morgan, Lee was one of the longest-serving executives. He was a close friend and adviser to the bank's chief executive, Jamie Dimon. "He wasn't driven by money or deals but by his passion for people. There was no more loyal friend to be had on Wall Street, nor anyone whose wise counsel I valued more", said Daniel S. Loeb, the founder of Third Point.