Had Coutts #4 l believe from a reliable private source, bloomed a nice yellow but due to near criminal rose neglect (planted in amongst giants) on my part it passed on.
Below thread snip by a “Warren” on Percey Wright Roses in Feb 2018 suggesting Hazeldean can have success.
I tried ecae pollen (tentative id ) with a white large flowered Altai and obtained seed - wait to see if germinates. Reverse hips nailed by birds or pet yard squirrel.
Few other yellows for thought that are hardy here in my garden… but not tried as not primary targets for leaping off to color goal - eg Hazeldean, R. primula R. xanthina normalis, Omiston Roy, Butterball, Yellow Scotch etc.
Waiting patiently for rosa hemisphericas to do once every 10 years bloom to give them a go ( unstable zone 4a Canadian in a good winter).