"up until 1915" you have the Russian Symbolists
"Andrey Bely, Alexander Blok, Valery Bryusov"
"the poem [...] stands between the outer world and the subject in a world of forms. A problem for the poet is to generate new symbols, to keep the symbolic function of poetry alive. A good American parallel to that would be Jack Spicer's theory of dictation, in which the poem is dictated by voice coming from outside, possibly from the moon. The metaphor of the radio is the search for new symbols."
"The poet's production of new symbols evokes magic, breaking new ground in the otherworldly."
"also, for the Symbolists, the implicative character of illusions was more important than the specificity of words. So that one would want a rich symbol – as a current example, Robert Creeley's 'The temper is fragile / as apparently it wants to be, / wind on the ocean, trees, / moving in wind and rain" is indistinct word to word, but it has a tremendous connotative power."
Watten 4-5