(This post literally pertains to someone who ever tried to "think" of making a horcrux. Not just long ago before Tom started gathering horcrux, I am ESPECIALLY PERTAINING to those who have thought of it, when Voldemort vanished.
Gathering horcruxes is one of the most unforgivable and violent offense in nature. As Voldemort tried to obtain immortality, he also wants the idea of 'no one can ever defeat me'.
Dumbledore convinced Harry to try each and every possible way to collect Slughorn's memory about that night when Tom came asking about horcrux, that Voldemort is the only one who had successfully turned seven significant things, (diary, diadem, cup, snake, ring, locket, and unintentionally... Harry himself).
"By an act of evil — the supreme act of evil. By commiting murder. Killing rips the soul apart. The wizard intent upon creating a Horcrux would use the damage to his advantage: He would encase the torn portion —"
"You think he succeeded then, sir?" asked Harry. "He made a Horcrux? And that's why he didn't die when he attacked me? He had a Horcrux hidden somewhere? A bit of his soul was safe?" "A bit... or more," said Dumbledore. "You heard Voldemort, what he particularly wanted from Horace was an opinion on what would happen to the wizard who created more than one Horcrux, what would happen to the wizard so determined to evade death that he would be prepared to murder many times, rip his soul repeatedly, so as to store it in many, separately concealed Horcruxc. No book would have given him that information. As far as I know — as far, I am sure, as Voldemort knew — no wizard had ever done more than tear his soul in two."
Excerpt from Hp HBP book 6.
It was a really dangerous thing to do... horcruxes. But Tom Riddle managed to turn and made 7 horcruxes, splitting his soul into seven hidden pieces.
Having said this, is there any chance that another bad wizard tried to gather horcruxes? For some reason, if that wizard tries to gain immortality, he also wants to be undefeatable, higher than Voldemort's rose to power.
Did someone tried to make a horcrux, specifically, did someone had that kind of idea pop into his/her head, just to gain immortality? Just like what young Tom Riddle desires?