Dr Daystrom
Super Freak
I think she's been very much like her character in the book. Only difference I think was that she wasn't ever Sansa's servant in the book. But I think the relationship with Tyrion is much the same
I sort of have to agree, I don't really see a "vast" difference in Shae's character between the books and series. Some details get shifted around, but overall more or less matches up imho.