On his birthday, let John Newton (author of "Amazing Grace") tell us why there aren't any perfect pastors.
In my imagination, I sometimes fancy I could [create] a perfect minister. I take the eloquence of ______, the knowledge of ______, the zeal of ______, and the pastoral meekness, tenderness, and piety of ______. Then, putting them all together into one man, I say to myself, “This would be a perfect minister.”
Now there is One, who, if he chose to, could actually do this; but he never did it. He has seen fit to do otherwise, and to divide these gifts to every man severally as he will. (Richard Cecil, Memoirs of the Rev. John Newton, p. 107.)