Which preposition to use with irreproachable

in Occurrences 9%

And it is impossible that she should have won the friendship of such a man, if she herself had not been irreproachable in her own character.

as Occurrences 1%

But his morals were as irreproachable as those of Marcus Aurelius.

of Occurrences 1%

But of all the bygone dames who haunt the grand Château, the only one I detest is probably the most irreproachable of allMadame de Maintenon.

than Occurrences 1%

" "And," proceeded Laura, "nothing can be more perfectly irreproachable than his people aremore excellent, honest, and respectable.

Which preposition to use with  irreproachable