Personnally i like thegreen and purpe checker and the purple and green checker the most. The pink one does not work for me i do feel more impact from the other, therefore i think it fits more the the harlie (and i don't like pink much but those are not my harlies)
The two head really does not cut it. I mean i don't like it it look like a great goblin, that i have to agree, but it might just be becuse of the green color, with a bit of white and red had a horn or two, you could turn it in a kabuki mask wich,in my opinion, would work better. But at this point it's all personal taste,so... up to you.