who drew this cartoon character?
Andreas Deja was the chief animator.
Scar (The Lion King)
However, Allers received Katzenberg's decision positively as an opportunity for "newer animators ... to step up to leadership roles", among them Andreas Deja, who became Scar's supervising animator. 
who voiced scar in the lion king movie Jeremy Irons
wiki:12981950
Scar (The Lion King) [SEP] Design and characterization
filling this devious coward with elegantly witty self-loathing." As an animator, Deja believes that "If you have a great voice to work with, your work is half done." Enjoying the way in which Irons "has a way with words and phrasing," Deja deliberately based much of Scar's appearance on the actor himself, specifically the shape of his mouth and facial expressions. Several of the actor's physical attributes were incorporated into Scar's design, with Irons admitting to recognizing his own baggy eyes in his character. Additionally, Deja studied Irons' performances in the films "Reversal of Fortune "(1990) and "Damage" (1992) for inspiration, while refusing to watch Disney's "The Jungle Book "while working on "The Lion King" in order to avoid being influenced by the film's villain - Shere Khan, a tiger.