"powerful contribution" is a correct and usable phrase in written English.
It is typically used to describe a significant and impactful contribution that someone has made. Example: His powerful contribution to the team's success was recognized by his colleagues and superiors.
After a ragged start, the chorus makes a powerful contribution.
Google's most powerful contribution might not even be deliberate.
That didn't make it any less of a powerful contribution.
Her whistle-blowing was a powerful contribution to the debate over national security.
Acceptance of the measuring methods developed may be a powerful contribution towards creating sustainable business practices.
It is also a powerful contribution to current debates about the meanings, persistence, and drawbacks of empire.
With their traditions of activism, Scotland's churches, however diminished in size, will doubtless have powerful contributions to make.
Theo Jones chronicles the death of a 29-year-old headmaster, followed by quietly powerful contributions from Bella Hardy and Josienne Clarke.
We are enriched by Yorkshire's writers and artists; by Northern Ireland's poets; by the powerful contributions that post-war immigration has brought us.
Equally noteworthy were the violinist Lily Francis, the violists Beth Guterman and Teng Li, and the cellist Priscilla Lee, all bright young players who offered powerful contributions alongside veterans like Joseph Silverstein and Paul Neubauer.
One of the year's most powerful contributions came courtesy of Janelle Monáe's resonating Hell You Talmbout, an electrifying track which name-checks young black Americans who have been killed by police officers, including Freddie Gray, Eric Garner, Michael Brown and Emmett Till.
