The photos and information I've found here helped me add over 100 names to my family tree. I hope to make similar contributions which may help others in their own quests, as so many others have helped me.
Mount Olivet Cemetery - Hanover, PA:
This cemetery is nowhere near 90+% photographed, there are still about 20,000 interments in Mt. Olivet not yet recorded on findagrave.
I've given up on transcribing every stone in the cemetery. I've already spent a ridiculous amount of time cleaning up after other F-A-G members who have half-assed this cemetery for years, and any future time spent continuing this endeavor would be wasted.
The memorial collectors have breezed through with their cameras, rushing home to create thousands of junk "memorials" with no burial location information, no family links, and no additional information of any kind even when it's carved into the stone, all while ignoring any graves with a stone that can't be read from the low quality photos they were in such a rush to take, not to mention completely missing all of the flat stones covered with snow, because a snow covered cemetery is the best kind to photograph. Duh.
If an existing photo is of poor quality (even one of my own) and you'd like a better one leave me a message and I'll see what I can do. There are many factors influencing the quality of a grave marker photo, some are tough to get around.
I do not scour the internet for obituaries 24/7 nor do I pore over historical records looking for names to add to my "collection". Quality trumps quantity.
The overwhelming majority of my memorials are created from information I interpret to the best of my ability from grave markers. Yes, I visit the grave site, in person. I usually spend time researching how people in the same plot were related. However, I will err, if you spot an error let me know the what and why so I can correct it.
A word about photos:
I require the simple courtesy of attribution. "Photo by Jeff Schneider" and a link to the findagrave memorial page works just fine. I do send DMCA takedown orders forcing sites to remove unattributed photos. Attribute it or lose it.
Posting someone else's photo with the appearance that it's yours is a jerk move, and should anyone ever have a question about the grave, the plot, or the cemetery, you'd have no answer and they'd have no idea where to look for someone who did.