A person who gives the forecast about the weather
A weather presenter
A person who plays music
A DJ
A person who is the questioner in a quiz
A quiz show host
A person who operates the camera.
A cameraman / A camerawoman
A person who reports on a story
A reporter
A person who talks about paintings and other works of art
An art critic
A person who makes illegal copies of paintings
A forger
A person who presents the news
A newsreader