This is such a tough question!
Geez... let me think, hummm. Well, I think Jake Naught reminds me the most of Jack, but I really liked the moral stance that Pard, and LaNague have. Don't forget about the loyalty of Ba, Abe, and Tome. The guts shown by Poppy, Romy, and the main Japenese guy in "Black Wind"(forgive me, I've leant the book to a friend a few years back and it hasn't been returned, I think his name was Matsumo....). I guess what I'm getting at is that I can't choose. Father Bill has stood up under extreme pressure, he's probably strongest in charecter, second to Jack. (And though the books haven't been written, Jack's probably second to Glaeken.) Geez.....