[Ali Imran]

And now you will be silent and not able to speak until the day this happens, because you did not believe my words, which will come true at their appointed time.”

Zachariah did not believe in Gabriel but God still deem him righteous! But you know it is a sin that he doubted the messenger of God!

So when Paul said no one is righteous, it is following Paul's standard of righteousness and not God's standard of righteousness, is that what you're saying?