I don’t think the AG boy doll is inappropriate, but it doesn’t look like a Jewish boy, so it’s just not applicable. Rebecca Rubin is problematic because after reading the books the message you get is that you can compromise on some of your traditions, replacing some of your Jewishness with Americanism, and be fully Jewish and American.
The Barbie doll itself is not appropriate, but the youngest Barbie sister dolls might be.