I've tried to track down the names of the artists who drew these covers (I'm assuming there was more than one even though the style is fairly consistent through all of these). There's a great website called Comic Book Plus which is a tremendous resource for information on Golden Age comics. Unfortunately, they give very few credits for these Fiction House covers. Instead, I turned to one of the great experts on Golden Age artists, Roy Thomas. He suggested that many of these roughs, if not all of them, were drawn by Joe Doolin.