LoneSurvivor
Although crime fiction novelist Agatha Christie’s two most popular detective characters are Hercule Poirot and Miss Jane Marple, she also wrote many romantic novels under the name of Mary Westmacott.
A) Although crime fiction novelist Agatha Christie’s two most popular detective characters are Hercule Poirot and Miss Jane Marple, she also wrote
B) Although crime fiction novelist Agatha Christie’s two most popular detective characters are Hercule Poirot and Miss Jane Marple, there are
C) Two of crime fiction novelist Agatha Christie’s most popular detective characters are Hercule Poirot and Miss Jane Marple, who also wrote
D) Hercule Poirot and Miss Jane Marple are the two most popular detective characters by crime fiction novelist Agatha Christie, who also wrote
E) Despite Hercule Poirot and Miss Jane Marple being two most popular detective characters by crime fiction novelist Agatha Christie, she wrote
There are issues with pronouns.
I don't quite believe '...novelist Agatha Christie's ...' is wrong per se. So may be one of the experts could weigh in on that.
Here is what I see
A. 'She' needs to have an antecedent that is specifically mentioned in the text. The next has A.C's characters and not A.C., So there is a missing antecedent issue.
B. This, for me changed the meaning of the sentence. It makes two clauses detached. There is not linking ground because there is no reference to A.C. in the second clause.
C. 'Who' is clearly wrong again, it seems to modify Jane Marple. And if not, then There is no A.C. in the text and hence no antecedent.
D. No issues, who modifies A.C. perfectly.
E. There is no use for the word 'Despite'. I also don't like the word 'being' here. The modification does not look right.