Here are a few more I'm trying to identify #1 and #2 are the same. I suspect #3 and #4 are not wildflowers, but they were growing in the wild. #5 and #6 almost looks like a Wood Nettle, but it has a smooth stem #7 and #8 are the same plant. It's between 6-7 ft tall.
I think you are right again. It was so large that I thought it must be something other than a Nettle family plant. From what I researched, False Nettle generally has leaves of up to 4 in. This one was well over that. Also, it blends in well with the Wood Nettle.