I've definitely thought of trees and plants, but the problem is that they'll take a while to grow as tall as I need them to, and, unless I find something evergreen that fits the requirements, they'll lose their privacy screen qualities for half the year. I mentioned this earlier, but I'm also considering getting camouflage netting to use as a tall privacy screen above the fence. I do have a 6-foot-tall wooden privacy fence between us, same height as the run so he can't actually see it from his back yard, but he can see it from the second floor of his house and is complaining about it ruining his window view

At this point I wouldn't be required to put a taller privacy screen and I absolutely would not do it just to make him happy (he's been making me miserable since March). I would do it to block my own view of HIM and his smug face.