[Knight of Gondor]

I honestly do not hold up either actress from the movies as a model of beauty. (Now Miranda Otto on the other hand...)

In the book, it's hard to say, having not seen either of them. I am sure that many of the impressions (such as of Eomer and Gimli) come not so much from appearance as from presence.

Galadriel had issues of her own from earlier Ages, and is obviously made of sterner stuff than Arwen. As a Ringbearer, her responsibility and experience was so much greater than Arwen, who was but a maiden of Imladris. She bore no Ring, nor responsibilities of leadership.

Arwen's love and devotion for Aragorn is to be admired, although her actions after the death of King Ellesar are a bit selfish. (Abandoning her children to wander Lothlorien in grief.)