George Warleggan is the primary antagonist of Winston Graham's Poldark novels and its TV adaptions. He was portrayed by Ralph Bates in the 1975 series and by Jack Farthing in the 2015 series.
George is a greedy and ruthless banker seeking to buy out the copper mines in Cornwall and turn the industry into a monopoly controlled by the Warleggans, at the expense of anyone who stands in his way, including the Poldarks. He manipulates Francis Poldark (cousin of Ross Poldark, George's archrival) by befriending him only to bankrupt him through a gamble at the hands of his cousin Matthew. George later regains Francis' trust by returning what he lost in exchange for the name of the shareholders investing in Ross's smelting company. Because many of Ross's shareholders bank with the Warleggans, George calls in their debts, essentially bankrupting them and putting a stop to Ross's mine operations. He even attempts to have Ross hanged due to his role in his cousin's death as well as his suspected involvement with smuggling operations. After he fails to do so, George begins taking up fighting lessons out of fear that Ross will come for him.
He also attempts to woo Elizabeth, Francis's wife and Ross's first love. Elizabeth is essentially the one person George truly cares about, showing several signs of not wanting to hurt her in his pursuits, even willing to defy his uncle, Cary Warleggan, when he threatened to have her entire family thrown onto the streets if their debts were not paid. After an accident that claims Francis's life, George officially proclaims his love for her and eventually weds her.
Despite being the primary villain, he frequently acts more humane and honorable than his uncle Cary or his lawyer and henchman Tankard.