Good analysis all around. I will add my proverbial two cents.
I never read the books. I am a completionist and if I start something and don't finish it drives me crazy.
I would say there is a 50% chance that he will finish Book 6 before he dies.
I am 99% certain that George R. Martin will
never publish book 7 before he dies. He doesn't use outlines so no one will be able to tell us how things would have ended. In fact, George doesn't know how his series is going to end.
He doesn't write with a firm plan. George doesn't construct plots and then fill the plots with characters. He constructs characters and lets them drive the plot based on what he thinks the characters would logically do.
Since I'm an aspiring fantasy writer, I should probably read his stuff for research purposes. George R. Martin has his flaws, but he is a master wordsmith with crafting dialogue, something I have need to improve on.
So I cannot speak from the book characters. My understanding is in the world of the books, nothing is certain and all twelve of these fighters could theoretically beat any of the other eleven fighters if they caught said fighter on a bad day. Based on the television series, I would go with Bronn or Syrio Forel. Syrio, via technical terms is the best fighter. Give him a real sword and he would theoretically be a powerhouse.
Bronn, has plot armor in the television series because he is awesome. Bronn cannot die and always ends up with a handsome reward. Problem is, while Bronn has never lost a fight barring the little expedition to Dorne where they were crazy outnumbered, the people Bronn protects often suffer horrible fates the second they leave Bronn's bubble.
Bronn would also be the most fun to hang out with though many of these characters would be nice to hang out with, at least for a short term. Not the Man Mountain or
the Hound though.
I don't know how George R. Martin thinks, but as a writer myself, I am less likely to kill off characters that lead miserable lives. By Scalenex logic, the Hound is the champion one should pick.
Also, the Hound is a combat pragmatist. He is not trying to prove anyone to anybody. He fights to win. Of the people on this list, Bronn and the Hound are the only pure combat pragmatists though Brienne, Jorah, and Robert are fairly pragmatic people.
And traveling with the Hound means we get to eat chicken.
Though I guess the Hound has a soft side. The Hound is a very selfish person, but the Hound is protective of women and hates rapists.
The chicken incident, and on two separate occasions, the Hound intervenes to kill rapists, but the Hound does not want to
look like he his chivalrous towards women so he manufactures a personal motivation to kill his enemies.
In this case, he starts a fight over chickens. The vide is very graphic btw. The KFC commercial cleaned it up
I will note that in the course of the show, the one time he loses a fight is against Brienne of Tarth. Probably because he did not want to harm a woman (even though he hates her guts). Nuance, what the show used to have before the last mahrlect season.
I'm okay with this. I'm pretty sure it would not be hard to stay off of Lady Brienne's enemies list.
If I was a woman, I would probably pick the Hound as my protector. Sansa was unwise to refuse his offer of protection.