Drew Struzan

Drew Struzan is famous for designing posters for dozens of movies. He uses a lot of airbrushing, and his work is quite famous for its composition. Unlike the other people whose work I've posted so far, Drew Struzan painted people accurately from photos, and most of his work has an emphasis on realism (aside from compositional elements like floating heads and stuff)

Blade Runner

Hellboy

Harry Potter

Star Wars