I have the Poetry for Young People series books for:
William Blake
William Wordsworth
Samuel Coleridge
William Shakespeare
Emily Dickinson (this in has riddles in poetry)
Robert Browning
Robert Frost
Henry Wadworth Longfellow
The Pied Piper
Each book comes with a short appropriate biography, 24-25 poems accompanied by delightful full color illustrations. I have others in the series, but they are the more modern poets – Langston Hughes, Maya Angelou, etc. This is my favorite go-to resource for poet study (at least introductions…).