Are there any poems that inspired TSV? I know I asked a similar question about plays, and I really loved the ones listen!
Well, there's a huge amount of Seamus Heaney in the landscape and vibes of TSV (particularly the bog-sacrifice poems for obvious reasons, the early Death of a Naturalist work trying to make sense of his childhood and parents, and his Buile Suibhne translations), and generally speaking we're sort of riffing off symbolist knight-errant narratives which includes poems like Faerie Queene.
They're almost too obvious and famous to be called influences, but I don't think you can write anything about religious and apocalyptic dread without feeling the looming shadow of The Waste Land, The Hollow Men and The Second Coming, and I think there's a lot of buried Rime of the Ancient Mariner homages in Carpenter's story (like one who on a lonesome road, etc) and Kubla Khan in Faulkner's.