I always thought streamlined passenger cars were appropriate with steamers......
....from the 1953 catalog.....
....from the 1957 catalog......
I'm sure that I'm not alone when I say that the Lionel catalog had a lot of influence on me as a kid on what I thought( or, thought I knew) about railroads........for example......since the 57-59 catalogs only depicted the N&W J with freight consists, I didn't realize that it was a mainly passenger locomotive until I lived in Virginia 20+ years later......
Peter