My favorite non-Giants are Clinton Portis and Fred Smoot. I don't care that they are/have been Redskins, they both make the league entertaining. Between Portis and his press conference characters and costumes (Southeast Jerome!) and Smoot's "double coverage", you can't go wrong.
Retired: Barry Sanders Bo Jackson John Elway Jerry Rice Tom Rathman Current: Peyton Manning Larry Fitzgerald Jason Witten Tomlinson Calvin Johnson