May I propose the class S46 'Claude Hamilton' locos of the Great Eastern Railway? Designed by Frederick V Russell, chief draughtsman at Stratford Works while his boss James Holden was out of the UK, they looked spectacular in the company's blue livery.

As for the much-admired A4 Pacifics, apparently the shed staff at Kings Cross were horrified at their appearance when they received their first allocation, in particular disliking the hump on top of the boiler.