"If the came to hear me beg......." IS EVIL!!!!!
"Send me out with a bang!" Sgt. Avery Johnson
Book-wise, probably Carter, though I'm still leaning towards Six.
Game-wise, obviously Six.
As for Six being like Kurt, What?! Kurt for me would be most like Carter, a leader, someone willing to sacrifice himself, breaking up disputes.
As for Fred, I can agreed with the Emile comparison, though I think Emile was more brutal than him, more raw.
Jorge being Sam, I'm not to sure on. We really don't see enough of Sam to make comparisons.