This site may help you in your journey. I have been able to use it to find out information about some of my family in Ohio, regarding death notices with dates and marriage notices.
Rutherford B. Hayes Presidential Center
An index to 2,100,000 obituaries, death & marriage notices & other sources from Ohio from the 1810s to the present day. Actual obits may be ordered from 50 partner libraries; only Hayes Library has online ordering.