Thanks again for the replies guys. I realize this is pure opinion based. Just to add for into, the corners look bigger in pics than they will actually be. A normal corner is usually about 6.5" and these are 15". This shop is actually in a rural area, not next to other commercial buildings. The copper was intended to toss a little barn flare.
As for building selections for those saying #1, which #1? The first pic or #1 in the second pic, because the buildings are different.
And again, I'm open to other ideas. It's funny how someone mentioned masonry corners because that is exactly where I was trying to go, but could not find anything that could install in this application without real masonry, which would be hugely expensive. The oil canning is something real to evaluate.