Harry: Superman. (Clark Kent).

Draco: Batman. (Bruce Wayne).

Ron: La veuve noire. (Natasha Romanoff).

Fred: Captain america. (Steve Rogers).

George: Iron Man (Tony Stark).

Neville: Hulk (Bruce Banner).

Lee: Spiderman (Peter Parker).

Seamus: Thor. 

Dean: Wonder Woman. (Princesse Diana).