Poetry:
* Dylan Thomas: A 20th-century poet known for his lyrical, evocative style and works like "Do Not Go Gentle into That Good Night" and "Fern Hill."
* R.S. Thomas: A renowned Welsh poet known for his austere, minimalist style and focus on nature, faith, and rural life.
* Gwyneth Lewis: A contemporary poet who blends lyrical and intellectual elements, exploring themes of science, nature, and technology.
* Owen Sheers: A contemporary poet and playwright known for his visceral and emotional poetry, exploring themes of war, memory, and identity.
Fiction:
* Ken Follett: A best-selling author known for his historical novels, including "The Pillars of the Earth" and "World Without End."
* Richard Adams: Author of the classic children's novel "Watership Down."
* Berwyn Jones: A prominent Welsh novelist known for his exploration of Welsh life and culture in novels like "The Devil's Paintbrush."
* Cynan Jones: A contemporary novelist known for his evocative and unsettling prose, exploring themes of loneliness, identity, and the natural world.
Non-fiction:
* Raymond Williams: A cultural theorist and scholar, known for his groundbreaking work on "Culture and Society."
* Terry Pratchett: A fantasy writer and humorist, born in England but adopted by Wales and widely popular for his "Discworld" series.
* Elinor Wyn Reynolds: A prominent Welsh historian and writer, known for her work on Welsh history and literature.
Other:
* Roald Dahl: Though English, Dahl spent significant time in Wales and drew heavily on Welsh folklore and landscape in his children's books.
* Cate Blanchett: A renowned actress, known for her roles in films like "Elizabeth" and "The Lord of the Rings," who was born in Australia but identifies as Welsh.
This is just a small sample of the many talented Welsh writers who have contributed to the world of literature. There are many more worthy of mentioning.
To delve deeper, you can explore the work of the Welsh Arts Council, the National Library of Wales, and other organizations that promote Welsh literature.