Lord Voldemort

After he graduated Hogwarts, Tom Riddle applied for the Defense Aginst the Dark Arts post twice, but was turned down. He visited his mother's old home, where he met his uncle Morfin Gaunt, who said he looked like "the filthy muggle who stole Merope." Tom, now known as Lord Voldemort, killed his father and grandparents (which allowed him to make his second Horcrux, Marvolo Gaunt's ring, which was the Ressurection Stone), framed their gardener Frank Bryce, and altered Morfin's memory to convince him he did it. He later assembled a group of followers which included Bellatrix Lestrange, insane cousin of Sirius Black, her husband and brother-in-law Roldophus and Rastaban Lestrange, Lucius Malfoy, Fenrir Greyback, Peter Pettigrew, Walden Macnair, Severus Snape, Igor Karkaroff, Evan Rosier, Crabbe Sr, Goyle Sr, Avery, Amycus and Alecto Carrow, Antonin Dolohov]], Barty Crouch Jr., Yaxley, Thorfinn Rowle, Regulus Black, Augustus Rookwood, Selwyn, Travers, and Wilkes. Voldemort also made 3 more Horcruxes: Salazar Slytherin's locket, Rowena Ravenclaw's diadem, and Helga Huffelpuff's cup. Later, after murdering Lily and James Potter, his body was destroyed by their infant son.