I was going to make a post for each position but I changed my mind.
Here is a list of the best FA's I could find out there at most positions.
Quarterbacks:
Josh Freeman
Running backs:
Full Backs:
Michael Robinson
Wide Receivers:
Danario Alexander
Earl Bennett
Austin Collie
Tight Ends:
Fred Davis
Aaron Hernandez
Offensive Line:
David Stewert
Defensive Line:
Kyle Love
Anthoney Spencer
Will Smith
Linebackers:
Paris Lenon
Pat Angerer
Cornerbacks:
Chris Houston
Drayton Florance
Safeties:
Jim Leonard
Will Hill