Would followers of the Ghost Dance have seen Eovoka as a prophet? Is that even a useful term of reference in the context of Native American religious revival?
In a book - a collection or primary sources - I co-edited, Uncovering Nevada's Past (2004), we included a few letters that were discovered in Wovoka's earthen structure after his death in 1932. A talented anthropologist, Terri McBride, wrote the introduction to the letters, and selected the texts to be included. In her introduction, Terri refers to the "Prophet" Wovoka - her quotation marks. I have consistently seen that term used, and I believe I have heard Native Americans use that term as well. I have concluded the term "prophet" to be appropriate and a "useful term of reference" as you say in the context of the Native American Revival. All five of the letters - which date to 1908, 1910, and 1911 - published in our collection refer to Wovoka with some variation of "father" as in "Dear father", "Dear Father Jack Wilson", and even "Dear Father in christ [sic]. Jack Wilson".
I hope this helps.