A Gentleman Villian

A man came to visit me last night,
His name was whispered in my mind,
A tall man with an easy gait,
A neat and handsome man full of wit,
Yet, despite his charisma I sensed a fiendish charm,
Lean yet fearsome all the same,
A devilish grin,
A penchant for sin,
Soon you too will know his name.