I believe what makes the hero "the hero" is because of their versatility, dragonlord is basically cannon at this point but shouldn't the dragonlord be something like... what the hero will become in the future, also, since Aegis is shown in the main story to be one of the important characters (what he does late in chapter 3) what if the hero was a soulweaver since he was training as one when he received Aegis, or if anything, make them any class depending on the world they are in, for example, dragon lord when the situation is incredibly dire (chapter 3) pumpkin lord for Halloween and ranger when exploring, if you don't wish to limit the hero just by defining 1 class as "cannon" then make them every class for different ads
One option that could be done is using Ash Dragonblade, he does fill the "hero" role fairly well and he is one of the few characters who we actually see grow. A completely new character could be made however that doesn't seem like a good idea to me.
As for names go, a title would feel less restricting because, lets face it, as soon as a character gets a "default name" everybody is going to want to use it (me included).
And finally, the face, always the controversial topic, if you were to add a hood it would only look good on a select few classes, same goes for a helmet, the default hair seems to go with most classes (don't like the way it looks like on the mage and rouge classes but that's just me) a completely new hairstyle could be made but most likely everyone would want that too
either way I'm looking forward to see what you will choose to do.