The Christian in me would just simply say that no one is
righteous and therefore we should go ahead and dispel with the notion of
attempting to compare our
penis sizes ahem righteousness and therefore
this question is totally invalid.
Now, if you want to substitute moral person for righteous then the question becomes valid again but don’t expect an unbiased answer when you ask someone how moral that person thinks of himself or herself. A truly humble individual would refuse to answer or at least qualify it with “I would like to think I am a good moral person…”.