The phrase "a reliable role" is correct and usable in written English.
You can use it when describing a position or function that can be trusted to perform consistently well.
Example: "In our organization, we strive to create a reliable role for each team member to ensure smooth operations."
Alternatives: "a dependable position" or "a trustworthy function".
Mr. Schäuble also appeared on television Sunday night, assuring Germany's European partners that Berlin would play a "reliable" role in the Continent's affairs.
He is considered such a reliable role model that Commissioner Bud Selig has a framed photo of Pujols in his Milwaukee office.
No longer the star he once was, Brand has slowly but surely established himself as a reliable role player on a solid team in need of some veteran leadership.
Instead, they seek a reliable role model or paradigm against which they can compare their actions and practices.
These are areas where we have been playing a reliable role for a long time".
After decades of the US setting an example of international diplomacy and democracy, it is more than an embarrassment that America is no longer being viewed as a reliable role model to the world in the election process.
He became known as a reliable character actor and started getting movie roles, too.
Two years after uniting James, Wade and Bosh, the Heat are still searching for reliable role players, or even a solid starting center.
But, although the UN force in Sierra Leone is the largest peacekeeping operation in the world with 13,000 troops, it proved incapable even of playing a reliable backup role.
Genes can have a reliable causal role in the production of a whole-organism phenotype, of course.
This is something that fascinates me about art houses: their reliable role in providing their mature and heavily female clientele with a steady stream of films that won't make them feel good.
