"compelling role" is correct and usable in written English.
You can use it to describe a role or job that is important or requires great skill. For example: "She plays a compelling role in the company as the head of marketing."
The interfaces play an important and sometimes compelling role in determining the performance of the composite.
Graham has the largest and most compelling role in the Giants' drama.
Jason Geller, Deloitte Consulting's HR transformation leader, is a compelling role model in this respect.
You might assume that in turning his attention to playwriting, he would concoct a juicy, compelling role for himself.
The most compelling role belongs to Mr. Pace, who brings a stylish physical and vocal vocabulary to his postures of alienation.
But while the Internet has shaken up the recorded music business, it has not found a compelling role in live music.
This latest from Square Enix, the masterminds behind Final Fantasy, sticks to what they do best: creating a compelling role-playing game with interesting character development, endless customisation options and an expansive world to explore.
Christie appeared only sporadically in films during the 1980s, finding few compelling roles for an actress in her 40s.
(It was remarkable, in the early nineteen-nineties, to watch members of Gigante's criminal and actual family provide rich, detailed testimony about his supposed mental incapacity; his mother and his brother a priest and onetime New York City councilman played particularly compelling roles).
Pedro Almodovar, who's casted Cruz in some of her most compelling roles, once said, she "belongs to the Mediterranean school of actors, a style characterized by its carnality, gutsiness, shamelessness, messy hair, generous cleavage and shouting as a natural form of communication".
Cornell's wrestling team began the season with a lot of injuries (senior Steve Bosak had to have surgery on his wrist), a number of promising new wrestlers, and their biggest star in a compelling new role.
