Hello,
As the "Gnu and Europa" motive is not going to be a logo, leaving out details is no longer the primary issue. I collected the three versions you already know along with a couple of variations on one of them and links to actual gnu images on the following page:
Most funnyly, I like the first draft (1a) best. This gnu looks strong and wild, not willing to eat the same non-free grass everyone else is satified with, and it makes a nice contrast to the lovely princess Europa. :)
100% agree
Greetings Dieter