TOKYO (Reuters) - Olympus Corp's main lender Sumitomo Mitsui Banking Corp (SMBC) denied it was trying to take control of the firm's board by stealth, but said it might well agree to send a former banker to be chairman of the disgraced camera and medical device maker. Foreign investors in the Japanese firm, which is engulfed by a $1.7 billion accounting fraud, have called for an entire renewal of the board, bringing in outside talent unconnected to the company, its banks or major owners. ...