We just spent 5 days in the parks this past week. I also made autograph cards for my kids to have signed. Here is who we saw...
Pluto & Goofy were often in the front on main street, as well as in Toon Town
Toontown: Mickey, Minnie (in their houses), Donald & Daisy (they rotated), Goofy, Pluto
Princess faire: They rotate, but it seemed Cinderella and Aurora were often posted on the board, we also saw Mulan there
Merida has her own M & G
Anna & Elsa (total craziness as people have posted here!!!)
Thunder Ranch Jamboree: We hit the mother load here, totally by accident, in the span of about 30 minutes. We saw Jesse, Woody, Thumper, Brer Rabbit, White Rabbit from Alice, Roger Rabbit, Brer Bear, Baloo, Minnie in pastels, Mickey in plaid pastels, Rabbit from Pooh...think a couple others but I forgot who.
Bert and Mary Poppins out front on Main Street
Mad Hatter & Alice by Matterhorn/Alice ride
Tinkerbell and two other fairies in Pixie Hollow
Snow White by the wishing well
Goofys Kitchen dinner: Jasmine, Minnie, Goofy, Chip (Dale was out briefly but we didn't get the chance to meet him), Mad hatter, Pluto
In DCA...
Sailer Donald was always out in a M&G spot near Ariels Grotto
Jesse, Buzz (does not sign) and Woody traded out in a M&G area in the back pier area past the Midway Toy Story ride
Doc McStuffins, Sophia the first, and Jake (Neverland pirates) trade out in front of the Animation Academy building
"Old time" Mickey (not sure what he is called, wears suspenders, cap) was often out in the Carthay Circle area
Tow Mater and Lighting McQueen in Carsland area, as others said, they don't sign
Hope that helps!