“Why fixate on these four qualities when God can use anybody He chooses.”
It is true. God can indeed USE anybody. To be consistent one must stipulate that if God can use anybody that includes not only your partisan candidate preference of questionable character, but also the even more questionable candidate of the other party. If God can USE anybody, then why is the Lord bound to your pragmatic choice of the lesser evil (in your eyes) rather than the paradoxical choice of the greater evil?