Which Characters or Group of Characters are Most Responsible for the Deaths Of Romeo and Juliet?

To succinctly answer the question, I think that Romeo is to be blamed for his own death and the death of Juliet. This is because he totally abandons the idea of marrying Rosaline, just because she won’t have sex with him, and she is the woman whom he is supposed to be deeply in love with! He is also to be blamed because he fights with Tybalt, and takes advice from the friar. Other characters are to be blamed as well for the dea...