All Good Things...

[Kuruharan]

I sometimes wonder who had it hardest: Aragorn, having to choose his time in the full knowledge of what that would mean for those he left behind, or Arwen, bereft and facing a fading world alone.

Arwen. Whatever guilt that Aragorn had about having to 'leave' it is still nothing compared to having to experience the desolating and bleak misery that those left behind feel.
Aragorn was just comprehending (or trying to) something that somebody else was going to have to experience. Arwen actually went through it. To me at least, there really does not seem to be any comparison.

And, now that you mention it, I don't think that I have ever seen a painting of Arwen all distraught and wandering through an abandoned Lorien. Depending on who would do such a painting, it could be a very haunting image.