Most large flowering climbers simply will not do well in Z4.
You could try Louise Odier in a sheltered area next to your house.
I'm a no fuss rose gardener in a low laying rural setting that might
as well be Z4 at times. Most large flowering climbers failed to thrive
even here in rural Z5.
I have played around with
A LOT of roses since 2000.
Literally buying 100's of them and now 15 years later
what left is once blooming ramblers, some OGR, Rugosas,
several Albas and a handful of Austins. You might want to
try to learn to appreciate once bloomers for their cane hardiness and Rugosas
for their dependability of bloom and disease hardiness.
Also look into Canadian Explorer and Morden roses.
