I like my acoustic blues on the raw side and although I respect ECs ability, guitar more than vocal, he has a tendency to be smooooth. This tendency has the effect, at least for me, of homogenizing what should be a gritty experience. The devils music, down at the crossroads, meets champagne bubbly music out dere in Nort Dakota! I agree with Tomryan above, Yardbirds, Cream, Blind Faith and Derek and the Dominos. It's been a search since then.