Vlad the Impaler, who lived in the 1400s is the guy most associated with the legend of Dracula. He was vicious, to say the least.
“Stoker in fact drew inspiration from a real-life man with an even more grotesque taste for blood: Vlad III, Prince of Wallachia or — as he is better known — Vlad the Impaler (Vlad Tepes), a name he earned for his favorite way of dispensing with his enemies.”
“In total, Vlad is estimated to have killed about 80,000 people through various means. This includes some 20,000 people who were impaled and put on display outside the city of Targoviste: The sight was so repulsive that the invading Ottoman Sultan Mehmed II, after seeing the scale of Vlad’s carnage and the thousands of decaying bodies being picked apart by crows, turned back and retreated to Constantinople.”
Read the rest of the history in the link below, but you may not want to.