Hiccup Horrendous Haddock was a smallish Viking with a longish name.

He couldn't hold a weapon.
He couldn't slay a dragon.
He couldn't fight a war.
He couldn't even choose a side.
He was laughed at.
He couldn't follow orders.
He couldn't shut up.
He was the most clumsy, awkward person you would ever have the misfortune to meet.
He was disrespectful.
He couldn't string two words together.

And yet,

He was the weapon.
He didn't slay dragons, he learned from them.
He didn't fight wars, he ended them.
He refused to choose a side.
He was envied.
He gave the orders.
When he spoke, the world stopped to listen.
He was the quietest, gentlest person you would ever have the honor to meet.
He voice rang with humility and respect.
He was legend.

Hiccup Horrendous Haddock was a smallish Viking with the largest heart.

And he proved them all wrong.