AS far as low poli go they are really good

Dragon and forest tiles next to lego ones looks amazing, you should submit those at least

I know i have seen them before, from what game are they from?

Why not make the hero the reluctant anti-hero?, things would start like this:

Your girlfriends runs with her lover and dumps a huge debt on you, the local lord whom you are indebted says either you bring him a relic from XXX(insert location name here) or you get an axe to the neck. When you arrive to the place and are figthing with the boss, that jackass of a chosen one sneaks in and steal the relic. You return home empty handed, noone believing the great hero would do that (steal from you), but since the lord´s brother, lord of another village is short on cannonfodder you get send there with a small troop. You are ambushed in the nigth (maybe while camping on Zombie infested Ruins?) and gotta run for the caves. And so on...

All while your debt get bigger and bigger (since all the local lords are family and know of you and take advantage of you to get their shitty jobs done) and the overly stupid and unbearing Chosen one gets in your way stealing your glory and relics.

In the end the final boss is your girlfriend, and her lover is the chosen one, who is so stupid he got tricked to give to her all the relics he stole from you. Making her a powerful deviless and the final boss to beat (with lots of pleasure).

Think of "Bards tale" or "Deathspank"if you want inspiration for this kind of story, and you can make the hero as cheeky and badmouthed as you want (cmon we all now we are tired of chilvarious knigths on their quest to save the world). Along the way the hero even may be named the lord of a goblin village by accident and to his horror, and had no other option but to accept. And even end up being remembered as the most evil warrior ever existed (just for slaying the stupid chosen one.)

Long post.... hope you use one of this ideas.