The McCartney Rose!!!!
Not only incredible scent, but easy to grow! I've grown it at the last 3 houses I've owned, in different soil and light situations, and it's been a standout performer every time.
It is one of the few I cut and bring in to the vase.
I'll second Memorial Day. I have 2 of these planted right where I get out of the car so I can take a whiff every time I come home.
I mentioned Love Song on another thread about mauve roses as a reliable bloomer with strong scent.
Oklahoma, an oldie but goodie. Wish all red roses had such a wonderful scent. I'm talking to you, Olympiad!
Mr. Lincoln is another great classic red with heavy perfume.
Gertrude Jekyll, with a bonus of growth so tall I don't have to bend over to smell her!
Actually, my sensitive nose picks up scent on all the Austin roses. His yellows are the best, though. Everybody can smell those!
Golden Celebration tops that list.
Abraham Darby, Tamora, Jubilee Celebration, Jude the Obscure, Pat Austin, Teasing Georgia, Molineux, Lady of Shalott all are wonderful.
I'm looking forward to buying Wollerton Old Hall this year. supposedly it's his finest scent yet.