When I look at "greatest of all time" -- yes, I look at the entire body of work, so yes, it's easier to do that after you've seen their prime, peak, etc. I would not argue with anyone's list that had Efren at # 1 and Mosconi at # 2, nor would I argue if someone had them reversed. I think some people don't give Mosconi enough credit, for several reasons. I only say this because I was very friendly with his son and learned a lot about the man, his career, etc. One, was because of gambling. If people who knew him well said he never played for money, I would believe them. If he did, I would say it was very, very rare. Two, his stroke was a relative secret until after the fact, and after he came back. After his stroke, by the time he was back to health, he had been out of action for quite some time, and he really needed to earn money. But, he didn't do it gambling. He started entering a lot of tournaments, local, nearby, nearby states, etc. He had not yet taken on a position with Brunswick (which I think he had in later years, after his retirement). I also don't know if he regained 100% of his form, capabilities, etc., after the stroke. Three, Mosconi was a family man. He didn't go out on the road, he looked to spend time at home, etc., and while he would travel for important tournaments, he always tried to spend as much time at home as possible.
I do remember one story his son told me. He was in junior high school at the time. Him and his friends were playing for nickels and dimes one day. His dad came home, saw them playing for money...and took the balls away from his son. I guess that tells you about what he thought about gambling.