Clarivate Analytics publishes the below list of Highly Cited Researchers (largely represented by STEM researchers).
The most well-known quantifier for researcher impact is the h-index. You can find a Researcher h-index in Web of Science, Scopus and Google Scholar databases. It is based on the number of citations publications have received and the total number of publications. Web of Science and Google Scholar can be accessed through the Chester Fritz Library.
Web of Science provides indexing, full text linking, and citation tracking for books and articles from vetted, high quality sources in all disciplines (arts and humanities, social sciences, business and sciences), as well as author, journal, and book metrics. Cited Reference Search includes books, artwork, and other cited works. Analyze results identifies frequent authors, funders, universities, and journals for a search or topic. Now includes Book Citation Index.
Investigate Altmetrics & Researcher Profiles for alternative methods of measuring researcher impact.