Bartemius (Barty) Crouch jr. used the Polyjuice potion to become Mad Eye Moody and taught Defence against the Dark Arts as him
Severus Snape. Also, the fake Alastor Moody was still a death eater.
Get your facts straight! Voldemort was never a Death Eater. The Death Eaters were originally Tom Riddle's (Voldemort) group of "friends" from Hogwarts.
A death eater hit him with a curse while battling in hogwarts.
Alecto Carrow - a Death Eater and Amycus Carrow's sister
No one. His twin brother Fred was killed (indirectly) by the Death Eater, Augustus Rookwood at the Battle of Hogwarts in May of 1998.
Dolovoh is a Death Eater He is also the person who kills Remus Lupin at the Battle of Hogwarts in Deathly Hallows
The Death Eater posing as Professor Moody, Barty Crouch Junior.
A death eater. This scene isn't in the book (because Harry wasn't there).
well if you mean the battle during the deathly hallows in my opinion professor McGonagall took charge of Hogwarts during the battle because Harry had to find the Horcrux while McGonagall kept Harry from the death Eater and rallied the teachers to fight while organising prefects to take all student under the age of 17 to saftey.
The death eaters started as a group of followers of Tom Riddle while Tom was still at Hogwarts. They refereed to the group members as Knights of Walpurgis.
George Weasley wasn't killed, he survived the series. Fred Weasley was killed in an explosion most likely caused by Augustus Rookwood.
Most likely at least one death eater in the Battle of Hogwarts