Complex sentence: Today his reputation is so established that the main business (extortion) proceeds smoothly without too much actual exercise of force and he is among the some persons in the Ghaziabad whose house was surrounded by lean, gun-wielding cops and private musclemen for security.
Split into simpler sentences: Today his reputation is so established that the main business (extortion) proceeds smoothly without too much actual exercise of force. Today he is among the some persons whose house was surrounded by lean, gun-wielding cops and private musclemen for security.