'unmatched reputation' is correct and usable in written English.
You can use it to describe a person or thing that has an outstanding reputation relative to peers. For example, "The organization has an unmatched reputation for providing quality services."
But Ramírez is also 36, with an unmatched reputation for unpredictability.
During this time he had an unmatched reputation as a publisher of taste and acumen.
How does that lostness feel, I wanted to know, especially in Greece, where the lonely spaces between rough and empty islands are balanced by an unmatched reputation for hospitality?
Citibank has invested heavily in the region since the fall of communism, and has reaped an unmatched reputation for its services to multinationals, blue-chip local companies and wealthy individuals.
The heavily armed cartel, which sends billions of dollars of drugs to the United States annually, earned an unmatched reputation for violence in the 1990's, when it dominated the drug trade in Mexico.
Jacobson has an unmatched reputation in his homeland as a humorist, but not all of it translates for an American reader, since the jokes seem to depend more on extreme aggravation of tone than on close observation of life.
For > 30 years the IARC Monographs have achieved a reputation unmatched for thoroughness, accuracy, and integrity.
A reputation for unmatched reliability certainly helps.
For years, Ms. Bach was a fixture in the New York jazz world, with encyclopedic knowledge of the music, virtually unmatched connections and a reputation for giving great parties at her home in Greenwich Village.
The school's tradition and reputation are unmatched; the regional talent base is among the nation's best; and the fans, deprived of any professional sports teams closer than Atlanta, are rabid.
Aldwyn Cooper, vice-chancellor of Regent's University, a private college that gained university status this year, said: "These findings show that UK higher education is unmatched in its global reputation.
