Red Grant
Just before the classic fight on the train, Grant outlines the Spectre plan to Bond. He calmly explains that the plot is to make it look like Bond killed Tatiana and then committed suicide as she was blackmailing him. There is also the added cherry of the film of them in bed. He then does that sick little laugh. This is not just a thug, but he is also a sadistic one. " The first bullet won't kill you, neither will the second....". This man enjoys inflicting pain.