Ditch digger, retail cashier, stockboy, janitor, fast food cook, car wash attendant, bat boy, welfare queen.
An example of not completely skilled is a doctor going through his residency phase. He's a medical doctor by license, but he's not fully skilled until he practices his skills for real.
A naturally skilled person is often referred to as a "talented" individual.
A person skilled in reading and writing is typically called literate.
artisan
Finance
statesman
no one
The word used to describe a person who is skilled in creating works of art is "artist."
astronomer
true
true
true