The phrase "are of considerable influence" is correct and usable in written English.
It can be used to describe individuals, groups, or factors that have a significant impact or effect on a situation or outcome.
Example: "The researchers concluded that social media platforms are of considerable influence on public opinion and behavior."
Alternatives: "have significant influence" or "are highly influential."
Corelli was of considerable influence on Henry Purcell (c. 1659 95), the most important English composer of his time.
Prison reform, temperance, peace, women's rights, and home-mission welfare work also engaged her attention, and, by her emphasis on the last, an early form of social agency work adapted to the rapidly growing cities, she was of considerable influence in reshaping the Quaker social outlook and work to the new realities of an urban-industrial age.
The "archaeological" and "genealogical" studies of Michel Foucault are of considerable contemporary influence.
The flow conditions in the boundary layer are of considerable interest to chemical engineers because these influence not only the drag effect of the fluid on the surface but also the heat or mass transfer rates where a temperature or a concentration gradient exists.
Hormones released by enteroendocrine cells, including peptide tyrosine tyrosine (PYY), GLP-1, GLP-2 and OXM, are of considerable therapeutic interest due to their favourable influence on appetite, energy expenditure and glucose tolerance.
He admitted he received a draft from Towers, but it was in the nature of a loan, as he remembered it; also that he received many drafts from Towers, who was a man of considerable influence with the banks of Washington, and frequently obtained drafts for him (Beavers) and had notes discounted for him.
Although the octogenarian Green, Democrat of Rhode Island, was a man of considerable influence himself, Johnson towers over him, both literally and figuratively.
Toch was a teacher of considerable influence; a number of his students, including André Previn, became eminent composers.
William was a man of considerable influence in the monastic reform movement.
