I agree, thats all it takes. They actually need 2 RH bats, one with power, and then maybe one that can hit LH pitching and platoon.
But, by just having that RH power bat in the lineup, with someone like Hafner batting behind him, players like Santana, Brantley, and Lopez should all see better pitches hitting that much lower in the lineup.
This FO not aggressively going after Willingham was one of the biggest blunders I have ever seen. He wasn't that expensive, compared to somebody like Cuddyer.