Harry Potter: Ranking Every Death Eater From Worst To Best
11. Igor Karkaroff
It wasn't until the Goblet of Fire that the Harry Potter audience was introduced to Igor Karkaroff. The wizard was seemingly nothing more than the Durmstrang Headmaster, until his dark past was uncovered bit by bit, and he was revealed to have been a Death Eater during the first Wizarding War.
After being sent to Azkaban for his crimes, Karkaroff voluntarily confessed the names of Evan Rosier, Augustus Rockwood, Severus Snape, and Barty Crouch Jr. as working for Voldemort in exchange for immediate release. Naturally, this put him on Lord Voldemort's naughty list with a target on his back.
This is why Igor was so concerned in the Goblet of Fire that his dark mark was acting up. Though if he was expecting any help or sympathy from Snape, the man he tried to turn into the authorities, he was looking in completely the wrong place.
One characteristic that any Death Eater needs to become one of the best is loyalty. When Karkaroff betrayed Voldemort to save his own skin, he confirmed his spot at the bottom of this list.