Dont know if this is who you are thinking of but Johnny Ervolino used to run the 100 balls without cueball hitting a rail. About 14 years ago Johnny stayed with me for 2 months, he really improved my one pocket game. Voodoo Daddy will alo verify watching him run the 100 without cueball hitting the rail. I have met and played ALOT of great players but Ervolino had more knowledge than them all.
I witnessed Johnny do this twice.
I would argue that George Mecula and Gene Nagy were both much better in straight pool...but neither had an appetite for gambling or high pressure. George and Gene were complete gentlemen compared to Johnny Ervalino who was more of a street smart pool hustling self proclaimed mafia stakehorse who was a master at sharking his opponent who would gladly dump if there was more money in it for him.
And for the record I lived in Midtown Manhattan and he stayed over at my place a few times when there were stretches of all night gambling over at Amsterdam Billiards (Upper West Side). He was always happy to talk about his life, old pool stories, and was very honest about how he had to make his decisions based on money, not on integrity.