scorpious
Yes, Draco Malfoy plays quite an important role in Harry Potter and the Deathly Hallows.
Malfoy's name in Harry Potter is Draco. Then there is his father (Lucius Malfoy) and his mother (Narcissa Malfoy).
The Malfoys: Lucius, Draco, Narcissa. Fenrir Greyback. Bellatrix Lestrange. Alecto and Amycus Carrow (the Carrows). Antonin Dolohov.
Draco Malfoy had been very mean to Harry Potter until Harry had saved his life in the Deathly Hallows.
Kyloias: At the end of Harry Potter and the Deathly Hallows\Part 2, since (in the Half Blood Prince) Draco disarmed Dumbldore which made it Draco's. In Harry Potter and the Deathly Hallows\Part 2 Harry disarmes Draco which made it his.
For all the Malfoys have a change of allegience at the end of Deathly Hallows, JK Rowling has never stated whether they give up the Dark Arts altogether. The only things she's said is that Draco's son, Scorpius, would probably be an improvement on Draco.
Draco Malfoy wasn't killed.
Draco was still single that time.
Draco Malfoy (Harry's classmate in some subjects), his father Lucius, and his mother Narcissa.
Yes
Nobody is in charge of him.
Draco is in it, but his role is minor really. He's not the main antagonist anymore.