I doubt a pot would support a rambler for very long. You could do a small climber.
But I have found the deer leave many of my ramblers alone, or just nibble slightly. (I rate deer damage as nibble, snack, meal, full gluttony). The Tea Rambler, Cecile Brunner, Psyche, Mrs Alfred Carriere and The Garland have been ignored. Alberic Barbier and Veilchenblau have been hardest hit, tho that may be location, and even then it was only snacks.
What is it that makes your soil unamendable?

I don't grow M Alfred Carriere in a pot, but as a tree so the deer can not reach high enough to harm, she is wonderful in CA, Huge, almost everblooming down here and the perfume fills the air. For a pink, I wonder about Blushing Lucy, again, not in a pot but grow up and out of deers reach.

Tell us why the soil is unammendable. If it doesn't drain I wouldn't plant there of course. One garden area of mine is almost pure rock. I just got out the pick axe and made giant holes and filled them in with good soil and ammnedments. The roses there are very happy. It's almost like they're growing in big pots.