The models that you have shown there are in fact TTTE models for the american market, and yes Percy is red not green so as not to be blatantly obvious. Copyright is semi flexable for them as they do make them in America anyway. This is the same thing that happened to Hogwarts Express - Bachmann have the license for the American Market, Hornby for the Brits.
Does anyone know of any real tank engines with a tank shaped like that. I can only think of the Deeley Gridirons but they had a hole rather than a bit over the splasher.
Which tank are you talking about? I don't know what engines the "Deeley Gridirons" are! If it is Percy, then the nearest loco I can come up with is 0-6-0 "Ring Haw" on the NNR. Most 0-4-0s tend not to have a protruding smokebox.
By the by, how many attempts have now been made on Sodor - I make it 3 and a bit...