And to answer Tony's OP in a manner he would approve (I think)....two words.....
Pete Dye.
From the railcar bridges to tie walls, pot bunkers, etc., back in the late 60's I can't think of any courses that were so visually and playing different than Pete's courses. Everyone else was pretty much going for the same look and his stood out, and influenced a generation of gca's.
Yes, railroad ties/sleepers had been used before, but IMHO, he used them differently (and far enough apart chronologically) to make them an innovation.