I am listening to a [history of England podcast](https://thehistoryofengland.co.uk/), and so far (only up to 1405) All the monarchs who started as children have been pitiful leaders.

Are there any (worldwide) that have turned out to be good rulers?

I understand why becoming King at such an early age would be terrible for you, I know if somebody had told 10 year old me "You are queen now" it would have gone straight to my head.

To answer questions:
By child I mean those who legally required a regent at the start of their reign. (or were under 12 years old, in principalities that did not legally require regencies)

For the purposes of this question, a "good" monarch is one whose reign was perceived as legitimate. Civil wars, pretenders and other crisis' of legitimacy are indicators that he monarch was not good. Please note in the answer if the monarch was perceived as good by his contemporaries, but would be perceived as especially bad by modern lights (excessive brutality, war, human rights violations, etc.),

I am just reading about [Henry III and found this quote from his wiki page](https://en.wikipedia.org/wiki/Henry_III_of_England)

> 
> By 1258, Henry's rule was increasingly unpopular, the result of the
>  failure of his expensive foreign policies and the notoriety of his
>  Poitevin half-brothers, the Lusignans, as well as the role of his
>  local officials in collecting taxes and debts. A coalition of his
>  barons, initially probably backed by Eleanor, seized power in a coup
>  d'état and expelled the Poitevins from England, reforming the royal
>  government through a process called the Provisions of Oxford. Henry
>  and the baronial government enacted a peace with France in 1259, under
>  which Henry gave up his rights to his other lands in France in return
>  for King Louis IX recognising him as the rightful ruler of Gascony.
>  The baronial regime collapsed but Henry was unable to reform a stable
>  government and instability across England continued.
> 
> 
> 

EDIT
Thank you everyone they were all fascinating reads, but as i am suffering from Brexit, I have to vote for a home grown king James the VI, and I look forward to hearing how my podcaster covers him.