Is this 'Barn Dance'?
The photo below is my "unknown", and I have several links to more closeups. I'm in zone 4b Iowa, and it survives the winter just fine, is very disease resistant, and is even thriving under a walnut tree. It stands about 4-5' tall, and has a light scent, but not overpowering by any means. Blooms profusely. Don't know if this helps, but I'd take any guesses as to what it might be. My best guess would be Barn Dance,
I bought markers to place names on all my roses I do remember (and for the ones I just purchased today). When I first started growing roses, I didn't think I'd care what variety they were, now I do. Beginner mistake no doubt. I'm up to about 50 roses now, they seem to love it here. I cataloged about 20 that I did know the variety, so I've got my work cut out for me this year to figure out the rest.