Some of us have listed roses that we consider relatively less disease-prone (or at least disease-impacted) in a recent thread:
For me, as a garden plant, Lemon Fizz’s seemingly strong blackspot resistance has been overshadowed by its very high susceptibility to anthracnose. Typical of many modern Kordes releases, we don’t know much about its background, so we can’t speculate too meaningfully about the sources of its characteristics. It may be useful as a parent, but you still need to approach breeding with it thoughtfully and evaluate its offspring carefully.
Stefan