There's actually a book that chronicles every unnatural death in Yosemite (that they know about) since its inception.
I, too, believe that Dikran probably died in the process of hiking to, or climbing up, Half Dome. I bring him up only because he is one of the few young men missing during the time of Corll that has not been tested. And he disappeared wearing an American culture shirt (red, white and blue with the word VOTE on it, which I found amusing), so it's not a stretch to imagine him decked out in a U.S. peace shirt. And possibly what they perceived as potential bi-raciality could have been his Armenian genetics. I know they suggested that he might be partially Hispanic. I guess it would come down to how they determined that.
I think he's a weak possibility, based on his size, location, and the circumstances of his disappearance. Just one that exists that hasn't been officially ruled out as Swimsuit boy.