I fouynd an Ellet Fuller 51/y, married to a Martha H. 34/y in Paulding county, Ohio in 1900. Children listed: Henry J 19/y IN; James R. 9/y IN; and Jonas C. 5/y IN. I am also doing research on Ellet as he is the brother of my Great Great grandfather Henry Jackson Fuller. I too have had trouble locating him after 1880, since most times his name is oftain spelled Elliott, or some off shoot of it.
Could it be possible they moved to Ohio for a time before settling in Langrange county, Indiana