neofinalism

Raymond Ruyer is a name that keeps popping up for me.  I first heard of him while reading Whitehead, and then Deleuze, and then randomly while listening to an interview with Hartshorne.

Ruyer's "neofinalism" is concerned with form and formation, insisting on purposiveness in a world of panpsychism and materialist vitalism.

Fractal Ontology blog gives us nice translation and paper propsal, and this article may also provide some background.  On the level of impact and importance, but also for just being interesting, a comparable figure vis-a-vis Whitehead, Deleuze, and friends would be Felix Ravaisson.