Miscanthus giganteus, Giant Miscanthus, also known sometimes as Miscanthus floridulus, will grow at least 10 feet tall in the growing season. That should screen most anything you don't want to see.

This ornamental grass doesn't require much. My clumps are growing in heavy clay. They tolerate wetness better than many other plants as well.

Don't use Miscanthus sinensis; this is an exceptionally invasive pest in KY.

You will have to cut down grasses in early spring (a LOT of work for a 60 foot length), and then you will have nothing for a couple of months at least.

I'm blanking. I can't think of anything that would put on that kind of height in one year - nothing you'd want, anyway, and nothing that would provide year-round privacy. The only thing that might do the job might be privet. There is a variegated privet that grows like a weed here in TN. But I'm not even sure, if you bought small plants of it, that it would grow that quickly when young.

Most things I can think of would take about three years to reach a good size. I put in some Leyland Cypress, Green Giant Arborvitae and Yoshino Cryptomeria as a screen about two and a half years ago, and they are just now starting to do the job. These were touted as some of the fastest-growing evergreens, which is why I chose them. But even they took a couple of years. The Leyland has been the fastest among them.