I don't disagree too much with your list, but I'd put Flutie above Bledsoe and Losman above Manuel.
Flutie got us to the playoffs a couple of times and if he'd played in the music city miracle game I think we would have won.
Losman gets a lot of abuse, and most of it is warranted, but I've always had a soft spot for him. His deep passes were something else, just the rest of his game that sucked. EJ on the other hand was just a nothing QB to me. Never did anything exciting and never did anything particularly well, at least from my memory.
Tyrod probably deserves to be higher simply because he helped end the drought, which I'll always be grateful for.