"fulfilled the role" is correct and usable in written English.
You can use it to describe when someone has done something necessary to complete a task or responsibility. For example: "John fulfilled the role of team leader and successfully completed the project."
He has fulfilled the role three times when the club captain, Antonio Valencia, has been unavailable.
He fulfilled the role so expertly it felt perplexing that he does not excel this way more often.
However, Adjani demands artistic control over her ventures, and has fulfilled the role of artistic director of Kinship.
The phrase "shock bowler" has become a cliche for those who bowl short, sharp spells, but Johnson fulfilled the role in the truest sense.
These spanned the crucial years in the 1970s through to the 1990s, when they both fulfilled the role of secretary general.
In the more recent crisis, the Federal Reserve fulfilled the role of liquidity provider, consistent with the classic prescriptions of Walter Bagehot.
He has also fulfilled the roles of Global Xbox LIVE subscriptions director and senior director for Xbox LIVE Expansion before starting his current role earlier this year.
The Radiotherapy & Imaging Trial Oversight Committee (RIOC) fulfilled the roles of the trial steering committee (TSC) and data and safety monitoring committee (DSMC).
Throughout his career he has fulfilled the roles of author, activist, folklorist, journalist, "nature boy," poet, and the first man to infiltrate and expose the Ku Klux Klan.
The first author and two research assistants fulfilled the roles of facilitator or note-taker in the data collection procedure.
The biomass fulfilled the roles as a catalyst as well as an electron donor in this redox reaction.
