I vote for a hybridic origin of the first one, too - due both to the form of dorsal sepal, the atypical colouring of the central parts of the petals, the shape of the shoe, and the strangely elongated form of the staminodinal shield (compare with the photo of the third plant's flowers, which in my eyes seems to represent a typical parishii).
I like the flowers on that last plant a lot - even when feeling the tug at my heartstrings, when I think of the demise of my own most beautiful and immense plant, which went to orchid heaven due to a vicious brown rot attack under treatment for mealy bugs...
:sob: :sob: :sob:
Kind regards,
Jens