Who played Jack Pearson in 'This Is Us'?

Who played Mike Wheeler in 'Stranger Things'? Who played Dolores Abernathy in 'Westworld'? Who played Queen Elizabeth II (seasons 1–2) in 'The Crown'? In which TV series is Queen Elizabeth II (seasons 1–2) a main character? In which TV series is Jack Pearson a main character? Who played Randall Pearson in 'This Is Us'? Who played Earn Marks in 'Atlanta'? In which TV series is Earn Marks a main character?