I made a recent realization. For months we have discussed the HWK as the first EU ship, since it comes from the Dark Force PC games and not from the movies. However the HWK does appear in the movies. I will have to go back and check, but I think it can be seen either flying over Mos Espa in Episode I or over Mos Eisley in Episode IV.
Either way it is a bit shot and you never hear it mentioned much less identified as a HWK 290, or the Moldy Crow for that matter.
But the TIE Interceptor is shown in Return of the Jedi but never discussed, the TIE bomber shows up in Empire but is never named. The B-Wing and the A-wing similarly just show with out any discussion of what they are.
Even the tern YT-1300, Lamda Shuttle, Firespray, or even Slave I are never actaully mentioned in the movies.
Sure I would agree that the HWK gets less screen time and less atention than any other ship appearing in the movies. But I think it is safe to say that if it is in the movies then it is not strickly a EU only ship.