0-6-0 Traffic Jam

[J3a-614]

But what would a generic 4-8-4 be?  They were just about all custom designed, very few looked like others from another road, although some were surprisingly close mechanically. 

[rogertra]

But what would a generic 4-8-4 be?  They were just about all custom designed, very few looked like others from another road, although some were surprisingly close mechanically. 

Not streamlined for a start. Rather like the Canadian 4-8-4s. Nothing that shouts "HEY, I'm a N&W 4-8-4!"  But your point is well taken.