Hayden Carruth, as quoted by Don Share on his blog :
"Pound is the leader, at the very forefront. Yet because of that, paradoxically he is at the center too: so much - one is inclined to say everything - comes from him. We at the center have a difficult time, often enough; always defining and redefining our position, entering correctives to the debonair pronouncements of the extremes. Not rationalism, we say somewhat acidly, but let us at least be reasonable; not positivism, but not enigma either; and in the matter of fashion, yes, we are friends with Robert Lowell, but we are friends with Robert Creeley too. It is a difficult work. But we take comfort from knowing that Pound is one of us, a man of the center, and that the love of proportion and justice requires, not a baser passion, as some assert, but on the contrary, as in his writing, the strongest and purest passion of all."
-- Hayden Carruth, "On a Picture of Ezra Pound," Poetry, May 1967
Holding such views about the "center", perhaps Carruth should be made an honorary member (sadly posthumous) of the Plumbline School. I know Joseph Duemer has spoken of him.