Since this we're dealing in hypotheticals and fantasies, can it be anyone from any time in history? If so, Harold Worst or 1980's Jose Parica.
Neither of those guys time warped into the present would have a prayer against Yang Chin Shun circa ~2002-2008 or so in a match like that. He would run over them with huge packages.
One thing pretty clear when you watch old pool matches is that the old time pros did not break as well as the premier players of today. Even guys from the past like Earl who broke hard did not show the extreme control of guys like Ko, SVB, or Yang when it came to hammering the rack and squatting the rock dead in the center of the table every time.