Andi, you might try 'Distant Drums'. it's not really a hybrid tea, but it kind of looks like one ...kinda..and it's really hardy!
We;re technically in zone 6 here, and i grow Mr. Lincoln, Chrysler Imperial, Olympiad, oklahoma, Charlotte Armstrong, Elle, Elizabeth Taylor, Double Delight, Brandy, Just Joey, Angel Face, Apricot Nectar, Firefighter, Kordes Perfecta, Neptune, John F Kennedy, Pope John Paul II, Fragrant Cloud, Tropicana, Nicole, Tiffany, Memorial Day, the McCartney rose, Black Baccara, Christian Dior, Opening Night, Love, Falling in Love, Electron, First Prize, Gemini, New Zealand, Perfume Delight, Aromatherapy, Pink Promise, Sheer Bliss, Sonia, Bella'roma, Cherry Parfait, and a few more... having said all that, i am surprised at the number i found on my spreadsheets! I would have guessed i only had 8 or so because I do not like HTs because of the maintenance. These are actually some of my favorite roses!
I don't feed or spray. I've grown many more than this list, but they've either died or looked so bad that I removed them.
Our weather is far more extreme than yours, and we don't get any snow cover most winters. I mulch a couple of inches, but that's it.
Hopefully that will reassure you, because most on my list are still readily available.
edited to take off a few floribundas...
