15D'Artagnan (The Three Musketeers)
The seminal novel The Three Musketeers featured the lead character d'Artagnan, who was based on the real captain of the Musketeers (Charles de Batz-Castlemore d'Artagnan). D'Artagnan was a daring, brave, and impetuous swashbuckler who became a fan favorite early on. He caught the eye of Bill Finger, who wanted to model
part of d'Artagnan's character on Batman. Finger wanted Batman to be as much a man of action, as he was a man of intellect.
It was d'Artagnan's heroism and willingness to do the right thing that surely connected most with Finger and readers alike. In 1943, Kane and Don Cameron created the villain the Cavalier, who bears a striking resemblance to a Musketeer. Today, Batman and d'Artagnan seem quite different-- save for their incessant need to pursue justice, even at the risks of their own lives.