"countless scholars" is correct and usable in written English.
You can use it to indicate that many experts have studied a topic. Example: Countless scholars have explored the effects of climate change on the environment.
Nor was any of this exceptional for Stanley: he launched and sustained the careers of countless scholars and journalists.
His singular legacy endures through the work of the Museum and the countless scholars whose lives he touched and work he influenced.
Our research was influenced by the work of countless scholars in this field, many of whom are mentioned in this article.
Over the course of his life, W. V. Quine, one of the twentieth century's great philosophers, engaged and inspired, interviewed and critiqued countless scholars, critics, and students.
Countless scholars, members and observers of Congress have documented the dwindling resources available to member and committee staffs, and to support agencies such as the Congressional Research Service, Government Accounting Office and Congressional Budget Office.
Their works have been studied by countless scholars over the generations; but rarely have they been brought into direct contact, outside of their use in relation to the Socratic problem.
Countless other scholars worldwide have replicated his findings, and it is now accepted science — although there is still disagreement about its causes and significance.
About 15 months, seven applications, and countless discussions with scholars later, I finally got a scholarship from the Amsterdam School for Social Science Research ASSRSocial Science Research ASSR
In the two centuries that followed, countless others – explorers, scholars and the simply curious – have followed in his wake, but still Petra remains a place full of untold secrets.
In fact, countless classical Islamic scholars after Imam Abu Dawud also dismissed the authenticity of this Hadith.
Countless experts and scholars have watched America's misadventures in the Middle East over the past several decades and learned the painful lesson so few in Washington can seem to grasp: American bombs do not solve the problem.
