We should never forget Polaroid with so many "films" it would be hard to list them all. Although most were not strictly film based, I think that's splitting hairs compared to all that they did for the photography world and the science of color and vision. I never used their 35 mm films which always seemed to be overly cute to me; however, It would be interesting to hear from someone who used their instant 35mm products.
Dr. Land was always one of my hero's; someone who was so creative and never got the notoriety he deserved because he was always operating out by himself. I was just reading Dr. Land's Wiki page which says he died in 1981 and that: "Upon his death, his personal assistant shredded his personal papers and notes." Considering all he must have know about the chemistry of film development I would have loved to browse through his papers.