Obviously Raoul. He actually cares about Christine...his love for her since they were children is just so much stronger than the Phantom randomly showing up.

Raoul is stupid!!!! Why would anyone want his shoulder?????? Besides, Erik can relate more. His poor life has been much worse than your horrible day!

I would pick Phantom because I like him best.. But now I'm thinking I actually probably wouldn't.. wolverinerollz - would you not feel guilty complaining to him about mundane problems when his life is so bad.. "Excuse me Amy (I'm Amy), shut up, you had someone be nasty to you on the phone today at work, get over it, my mother despised me and it went downhill from there..."
Raoul however would, unless he acted by that guy from Phantom 25, be really sweet and caring and want to sort out the problem and as he has none of his own it would be fine...
I think Madame Giry would be the sort of person that would slap you and get back to rehearsing..
And as for Christine.. she has too many of her own problems.. chandeliers falling at her feet..