Is Bryce Harper the best Philadelphia Phillies free agent signing EVER?

Today marks 6 years since the Philadelphia Phillies shocked the baseball world by signing superstar free agent Bryce Harper to a 13-year, $330 million contract. Six years, one MVP, and three postseason trips later, is Bryce Harper the best free agent signing in Phillies franchise history? We'll rank the top 5, including Zack Wheeler and Kyle Schwarber from the current Phillies, and two Hall of Famers, as well.