Voldemort had never told his followers where he had hidden the Resurrection Stone. Even if some Death Eater really could find the Gaunt Shack, why wouldn't they resurrect him themselves?
Voldemort knew all too well what sort of people his followers were.
Put it this way: when things were going their way, those followers of his were second to none.
Hadn't even the Order of the Phoenix, personally founded by Dumbledore, been beaten back by his Death Eaters?
The fundamental reason was that they had been fighting with the upper hand.
Whenever there were benefits to be had, the Death Eaters practically tripped over each other in their eagerness.
Right now, resurrecting him offered the greatest reward a Death Eater could hope for. Would his followers really let a bunch of werewolves take the credit?
Most importantly...
"Was this 'sacrifice' also chosen for you by that 'follower' of mine?" the Resurrection Stone's Voldemort asked sinisterly.
"Yes." The young werewolf looked bewildered. "Is this sacrifice not good enough? He's a master wizard certified by the Ministry of Magic!"
"Ha! He is indeed a master-a fraud of a master!"
That was precisely what infuriated the Resurrection Stone's Voldemort. If this "sacrifice" had been a genuine master wizard, he could have used the curse on the ring to take over the master's body outright.
A master wizard would undoubtedly have a strong foundation. With that, even if he couldn't immediately regain his full strength, he could at least recover eighty or ninety percent of it.
Even without a master wizard as his sacrifice, if his followers could get him an elite wizard from the wizarding world, he could still recover sixty or seventy percent of his strength.
Even against some veteran master wizards, he would be able to hold his own for a