Lord Voldemort. The death eaters are his followers.
Flur and Bill's wedding gets interrupted by Death Eaters
There are giants that are all helping Voldemort and the death eaters as well as the death eaters using forbidden or destructive spells.
loudly
voldemort and his death eaters
Tonks
To see who comprises the Death Eaters, check the Harry Potter Lexicon. (http://www.hp-lexicon.org/wizards/death_eaters.html) The Death Eaters.
The Salt Eaters was created in 1980.
Geleen Eaters was created in 1968.
The Brain Eaters was created in 1958.
The Lotos-Eaters was created in 1832.
The Life Eaters was created in 2002.
Eaters of the Dead was created in 1976-03.
Acid Eaters was created in 1993-08.
Not all the death eaters die in Harry Potter.
The Lotus Eaters - novel - was created in 2010.
The Fire-Eaters was created on 2003-08-14.
Fresno Raisin Eaters was created in 1906.