preeminent
adj.adj. the most important, successful, or respected in a particular field. You use this to describe someone or something that is at the very top of their group.
adj. holding the highest rank, position, or authority; most prominent or distinguished. Often used to describe a person's standing in a professional or academic field.
She is a preeminent expert in her field.
The university is a preeminent center for medical research, attracting top scientists from around the world.
While many competitors entered the market, the firm remained the preeminent authority on digital privacy, setting the standards that others eventually followed.
Borrowed from Middle French preeminent and its source, Latin praeēminēns, present participle of praeēmineō (“to stand out, excel”), from prae- (“pre-”) + ēmineō.