Conversely, the Pennsylvania Railroad seemed to own the "ugly stick", judging by its fleet.
Here are just a few: DD1, P5a, GG1, FF2, E44a.
I've been hauled by a GG-1, and yes - ugly in real life!
GG1? Ugly? Wash your mouths out, good sirs!
Say what you will about their looks, but their service record and longevity (due partly to planned replacements not being entirely successful; looking at you E60) is without question: January 1935 to October 1983 (48 years; both the A4s & Deltics' full service careers had come and gone in that time), and in that time had lived through WW2, the gradual post-war decline of the PRR in line with the majority of the established US railroads, it's fraught and ill-advised merger with the New York Central into the calamitous Penn Central and it's subsequent record-setting bankruptcy, then seeing out their final post-PC years with Conrail, Amtrak & New Jersey Transit (the latter not withdrawing their final examples until October '83).
We're not likely to ever see one of the survivors returned to working order either. Apart from anything else, their transformers were removed thanks to PCBs in the insulating oil. And even if one were ever returned to working order and all that would entail, there's not that many places you could run it (certain sections of the Northeast Corridor). So consider yourself lucky in that regard,
@Tester; not many of us here can say that we were hauled by a GG-1 in service!
They're not ugly, they're just extremely bland. To continue my earlier car analogy, the 66 is the Vauxhall Insignia of locos.
Keeping with the car analogy, that would make the 59s either the Vauxhall Vectra (the Insignia's predecessor) or the Lotus Carlton (in reference to the 59's comparative scarcity and performance relative to it's contemporaries) of the diesel world.