I'd also say that Tim Buckley is possibly the only artist to plough a similar furrow.
I read the Lester Bangs piece on the album long before I bought it. Its one of the best record reviews ever written and the album didn't disappoint either. Cypress Avenue and Madam George, in particular, are astonishingly moving and emotionally dynamic.
Absolutely - all anyone needs to do is play "Dolphins" and "Once I Was" from "Dream Letter - Live In London 1968" to get the connection. "Astonishingly moving and emotionally dynamic" perfectly describes those two Tim Buckley performances also.