Amongst the earliest Elizabethan plays are Gorboduc (1561) by Sackville and Norton, and Thomas Kyd's The Spanish Tragedy (1592). Gorboduc is notable especially because the first verse drama in English to hire blank verse, and for the way it developed features, from the sooner morality plays and Senecan tragedy, https://cognitiveinstituteofdallas.org/parenting-channel.html