I voted for 4, not because it is the most beautiful (I actually think that one is X...), but because of the presence of Kain. At that time there was no logo as we know of it now, but the image on tha game box was the picture of Kain from which the logo has been made.
It's pretty strange, because if you think about it, it should have been Cecil...but I like it even more because of that.