Yesterday after posting about my Schaeffer line, I decided to do some quick research on my 4th great-grandfather, George Schaeffer. I have his wife, Elizabeth Klinfelder, living in Pennsylvania between 1760 and 1835. His daughter, Catherine Schaeffer, my 3rd great-grandmother, was born in Pennsylvania in 1784. That lead me to surmise that I could probably find George somewhere in Pennsylvania in 1790. I searched the 1790 US Census for a George Schaeffer living in Pennsylvania. I found several, but one was living in Dover, York County, which is where the family of Catherine's husband, Andrew Strayer, comes from. I clinked on the link to view the image and I immediately recognized it. I posted it a couple of weeks ago because John Peter Stayer and his father-in-law appear near the top of the page. About halfway down the page is George Shaffer.
It will take a lot more research to verify that this is the right George Schaeffer, but his close proximity to future in laws makes me think I've found the right man. Plus his wife was born in York Co., PA. I still have no info on when and where he was born and died, but this is a start.