I like Hardy's poem, The Darkling Thrush.
One of my favourite poets is Emily Dickinson. I especially like her nature poems. Other favourites: D. H. Lawrence (Snake), Henry Wadsworth Longfellow (Hiawatha), E. Pauline Johnson (Thistle-down), Percy Bysshe Shelley (Love's Philosophy), Christina Georgina Rossetti (What is Pink?) - to name just a few.