As vigorously as I argue for the point, and as much as I agree with the historicity of Jesus, I wouldn't say "100% plausible." Yes, I find historicity more plausible than myth (mainly because of the fragility of most conspiracies), but to look at the legends of "the Christ" and not be able to consider that since part of that legend is mythical, ALL may be mythical, is simply not looking at all the evidence.
Part of the reason I accept the historicity of Jesus, even with all the mythic trappings that were piled on top, is the proximity of the writings of Paul to the events described. When Paul was writing, there were still people around who could have called him on it if he were spreading stories out of whole cloth.