Between the Patriots, Eagles and Ravens - which team has been most successful?
Obviously the team of any decade, NE Patriots.
And you do realize Eagles won their ONLY SB because of KEY contributions of big name FA/trade acquisitions like Nick Foles, Chris Long, Jay Ayaji, LeGarrett Blount, Darren Sproles, Alshon Jeffrey, Stefan Wisniewski, Brandon Brooks?
And both of Ravens starting WR (Anquan Boldin, Torrey Smith) + starting OL Matt Burk and Bryant McKinnie on 2012 SB winning team were FA acquisitions.
Even Giants won SB46 with mostly homegrown talent (exception was starter Chris Canty) but won SB42 by adding impactful FA like Plaxico, Sam Madison, Steve Smith, Antonio Pierce, etc.
Adding key big name players (via FA or trade) improves teams, especially the contenders.