I can not approach this question with any sort of seriousness because I'm just not built that way but the topic is still an interesting one. L7's "Pretend We're Dead" immediately springs to mind as do a couple of songs from The Smiths. "Cemetery Gates" would be a nice choice and "There Is A Light That Never Goes Out" would be amazing if I died in a very specific manner. The over top emo thing to do would to drop John Cage's "4'33"" so everyone has to drink in the silence, but ultimately I would have to go with the fake Tupac song from Chapelle's Show. It was the dopest song I ever wrote.
Chappelle's Show - Tupac is Alive from Dundy on Vimeo.