The phrase "a powerful executive" is correct and usable in written English.
It can be used to describe someone in a high-ranking position within an organization who has significant influence or authority.
Example: "The company was transformed under the leadership of a powerful executive who implemented innovative strategies."
Alternatives: "a strong leader" or "an influential manager".
The larger unions want to create a powerful executive committee, and one divisive issue is how much power medium-size and small unions would have.
Because of this, we can afford to have a powerful executive.
N.R.A. officials said that Mr. Knox, once a powerful executive at the group, had other motives.
James Madison proposed a presidency that was a handmaiden of the legislative branch; Alexander Hamilton favored instead a powerful executive elected for life.
Some banks which performed best during the crisis flouted the rules of good corporate governance: Santander had a familial culture and a powerful executive chairman.
In the case of Alibaba, the company is a complex organization with more than 20 different operating companies and a powerful executive in Mr. Ma.
This week, Erdogan said that Turks should begin debating a move from the current parliamentary system, in which most of the governing power rests with the prime minister, toward a presidential system with a more powerful executive, along the lines of the United States or France.
But he makes no secret of his ambition to become a newly powerful executive president under a changed (French-style) constitution.
The markets, the European commission and Confindustria, the Italian equivalent of the CBI, warmly applauded the idea of a streamlined parliament with a more powerful executive.
"Judicial conservatives for a long time believed in a very powerful executive branch, but in more recent years there has been sharp skepticism toward Presidential power," Justin Driver, a professor at the University of Chicago Law School, told me.
Nowadays, however, throughout the democratic West, "the problem lies not with a too powerful executive branch, but rather with a body politic that is so highly diversified and full of conflicting interests that it can't function.
