'a man of virtue' is a correct and usable phrase in written English. It is typically used to refer to someone who is highly principled and moral. For example, "The king was a man of virtue, known for his kind and just rule.".
South Korea needs a leader who is a man of "virtue, patience and forgiveness", he said in a written interview recently.
In Chinese historical tradition Wenwang was depicted as intelligent and benevolent, a man of virtue who won popularity among his contemporaries and expanded the realm of the Zhou.
Students recite by heart from Pushkin's "Yevgeny Onegin" ("My uncle was a man of virtue.... .....) and tackle algebra as early as fourth grade.
Craig Murray is a political activist and former ambassador to Uzbekistan An ambassador is a man of virtue sent abroad to lie for his country.
Charles Smithson, we may conclude, is a man of moderate virtue.
Or, maybe, he was a man of civic virtue, who placed the needs of his nation above his own comfort.
"A man of small virtue, inclined to extravagance and alcoholism" is how Joyce described himself to Carl Jung.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union