Which of the following is considered a major contemporary playwright?

Lin-Manuel Miranda is considered a major contemporary playwright primarily due to his groundbreaking work in musical theater. His notable contributions include "In the Heights" and "Hamilton," both of which have significantly influenced modern musical storytelling and have garnered critical acclaim and widespread popularity. Miranda's works often blend various musical genres, cultural narratives, and innovative staging techniques, making them highly relevant in today's theater landscape.

The other playwrights listed, while immensely talented and influential, belong to earlier periods of theater history. Arthur Miller and Tennessee Williams were pivotal figures in American theater in the mid-20th century, known for their exploration of social issues and human psychology. Henrik Ibsen, on the other hand, is recognized as a foundational figure in the development of modern drama in the 19th century, notably for his realistic portrayal of societal issues. Thus, while these playwrights have had a profound impact on theater, Miranda’s contributions are distinctly positioned in contemporary theater, reflecting the current cultural and artistic currents.