Okay, so my mom made a really good point. She basically told me to get over it and accept the fact that there's only going to be 'big' stars in this film. So here's my ideal cast with that in mind:
Jean Valjean: I'm still gonna say Alfie Boe. He's HUGE in Britain so he qualifies.
Thenardier: Geoffrey Rush
Madame Thenardier: Helena Bonham Carter
Fantine: Kate Winslet or Gwyneth Paltrow
Marius: Jim Sturgess
Enjolras: Patrick Wilson (might be a little old)
Eponine: What's-her-bucket from Glee...because you know it's gonna happen.
Bishop: Colm Wilkinson (No, he's not a 'big' star, but this isn't a 'big' role. Since he originated Valjean it just seems appropriate he have some sort of cameo.)
And while we're at it, could we get Alan Rickman in there? He could be one of the guards that shouts/sings to the students behind the barricade. Or little Gavroche. Rickman can do anything, don't deny it.