What is the most tragic element of Hamlet?

Alas, poor Yorick...

For our final post on Hamlet, I'd like you to do a bit of internet research on the elements of a Shakespearean tragedy. Make sure you find credible sources--folks who are genuine pros in their field.  Then, post your thoughts about the ways in which Hamlet fits the template of a Shakespearean tragedy, as well as the ways in which it might deviate from the formula.

Finally, now that you've read the end of the play, what do you consider the most tragic aspect of the play?  Is it Ophelia's death?  That Hamlet dies without ever really being king?  That only Horatio is left standing...and he now has to serve Fortinbras?

Make sure your post is thorough (at least 300 words) and utilizes properly-cited textual support from the play--check your MLA guide for how to cite Shakespeare.  Also, make sure you mention and hyperlink to your sources on Shakespearean tragedy, so your readers can see what you researched.

Given the lateness of the prompt, please post by no later than 3pm on Friday, November 30.