Who played Aragorn in 'The Lord of the Rings' films?

Who played Harry Potter in the film series? Who played Hermione Granger in the 'Harry Potter' films? Who played Frodo Baggins in 'The Lord of the Rings' films? Who played Gandalf in 'The Lord of the Rings' films? Who played Tony Stark / Iron Man in the Marvel Cinematic Universe? Who played Captain America in the Marvel Cinematic Universe? Who played Thor in the Marvel Cinematic Universe? Who played Black Panther (T'Challa) in the Marvel Cinematic Universe?