No we all don't. I never saw Ruth or Williams play. But I did see Mays and Clemente play in person, and play during their prime. Mays is my all time favorite player........period!! Both were 5 point players. There was nothing Roberto did or could do that Willie couldn't or didn't. Who was best between these two, who's to say. You could win with either one of them, and they both could hurt you.
During my little league playing days, from time to time, would try making Mays' outfield "basket catches" during practice sessions. My success rate was about 50%. I got hit in the head, mouth and chest trying. I never had the stones to try one during a game. If I did and dropped it, I'd probably never see the field again for THAT coach. I NEVER saw Mays drop one. He always did it nonchalantly, and made it look easy. It wasn't.
The great ones make what they do look easy. I saw many of the great ones, Koufax, Nolan Ryan, Bob Gibson, Wilver "Pops" Stargell, Stan Musial, etc. According to Statcast, Stargell is one of only 4 players to hit a ball out of Dodger Stadium, and he did it twice. The others: Mark McGwire, Mike Piazza, and Giancarlo Stanton. One of Stargell's bombs traveled 506 feet, and is probably still rolling.
I'll agree that Clemente was one of the best. All of MLB liked and respected him. But the jury is still out on who was THE best. That's subjective. Everyone has their favorites, and nothing/no one is going to change their minds.