A bedrock claim of Scripture is that righteousness produces good fruit both for the individual and the community. See Psalm 1. 

And while God uses imperfect people such as David he does not normally choose really bad people as his agents. Cyrus is certainly not presented as a bad person. https://en.wikipedia.org/wiki/Cyrus_the_Great

Church Militant compares Trump with Constantine, who indeed had a morally spotty side; but Cyrus is one the most universally admired leaders the world has known, and in no way comparable to a dud like Trump.