Hi John,
My source to discover more about Apollinaire's predecessors is this great little book,
Pattern Poetry:
https://books.google.com/books?id=vLNjq4New-MC&printsec=frontcover&dq=pattern+poems&hl=en&sa=X &ved=0ahUKEwj6krWx0IjdAhXsyVQKHW-tBFcQ6AEIMDAB#v=onepage&q=pattern%20poems&f=false. One of my fave courses to teach is Graphic Poetry and the Graphic Novel, since so many people know about the graphic novel but are ignorant of the poetry tradition. Mary Ellen Solt is probably the best of those in the post-Apollinaire era, though I have a soft spot for Kenneth Patchen. See ya, Tony