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Tear Jerker: Bubba Ho-Tep
The very end: Elvis dies after successfully killing the mummy.
JFK does as well, just a bit earlier.
This troper found the beginning MUCH sadder.
After Elvis' roommate dies, the roommate's daughter who hadn't come to visit her father since dropping him off at the facility goes through his old things and then tosses his old pictures and Purple Heart in the trash. When questioned, all she can give Elvis is excuses about being busy and he would have been in a ditch if not the rest home.