The phrase "a most outstanding" is correct and usable in written English.
It can be used to emphasize the exceptional quality of something or someone, often in a formal or literary context.
Example: "Her performance in the play was a most outstanding display of talent and dedication."
Alternatives: "an exceptionally remarkable" or "a truly excellent".
She won four ARIA Awards including a "Most Outstanding Achievement" award, and two Brit Awards, for "Best international female solo artist" and "Best international album".
Van has had a most outstanding career in bioengineering as a scholar and leader that spanned over four decades.
At our first meeting years ago on a yearly bike outing with friendly research teams, Prof. De Clercq fascinated me by his sporting drive, as I had already learnt that he was a most outstanding medico-scientist not only in my country Belgium, but really on a global scale.
The nimble big man garnered A-10 Championship Most Outstanding Performer and conference Player of the Year honors.
Where to Go To determine our list of America's 10 best national parks, we asked travel professionals to tell us which ones provide an the most outstanding experience overall.
Alfred Nobel's will decreed that the prize should go to a writer with "the most outstanding work in an ideal direction".
Someday even I could write a novel deemed "the most outstanding work in an ideal direction," as Alfred Nobel's 1895 will read about the criteria for the prize.
Before his role at the ABC, Paul Chadwick, worked as a journalist, lawyer and statutory office holder, receiving a Walkley Award for Most Outstanding Contribution to Journalism.
Wu Wenzao also won an award for the most outstanding foreign student in nearly a decade for his PhD dissertation at Columbia University.
Studies focusing on the ignition and combustion model of a single boron particle have been taken place for a long time, the most outstanding model is proposed by the group of Kuo, which is simple and can be well used in CFD application.
Vetter earned a second Frozen Four Most Outstanding Player award to go with this year's Patty Kazmaier Award as the top player in women's college hockey.
