I'm a big fan of the New York Central, and I wonder if maybe it's possible to add the famous New York Central Hudson.
A little background on the locomotive for those not familiar: In the late 1920s, passenger train traffic was at its height. With more ridership than any other type of public transportation, trains had grown longer and heavier. The old 4-6-2 "Pacific" type could not keep up with the demands, and it was clear a new locomotive was needed.
In 1927, the New York Central built a fleet of new 4-6-4 "Hudson" type steam locomotives which proved wildly successful and became some of the best known steam locomotives ever.
I have two pictures of the aforementioned loco here. The first one is the first Hudson to be built no. 5200:
Second is a streamlined version of the Hudson made in 1938 for the Central's premier passenger train the 20th Century Limited:
Anyone up for the challenge?