Who is the greatest chess player of all time ?? Bobby Fischer ??

The only way to objectively compare players from different eras is by comparing their moves with computer choices. In that regard, Rybka and Crafty have issued their verdict (https://en.wikipedia.org/wiki/Comparison_of_top_chess_players_throughout_history).
The best way to compare the top-players is to ask the best players in the world what they think. The best ones understands. From your wiki-link:
"Magnus Carlsen (2012 and 2015)[edit]
In 2012, Magnus Carlsen said that Kasparov is the greatest player of all time, adding that while Fischer may have been better at his best, Kasparov remained at the top for much longer.[49]
In December 2015, he repeated his great respect for both Fischer and Kasparov when he mentioned them several times in an interview, saying he would like to play against them at their peak performance. Also, he said he liked the style of play and games of Vladimir Kramnik. As the toughest opponent to beat nowadays he named Levon Aronian.[50]"
This is 2015-statement. Ask Magnus after the WC-match if that still is true, or if Magnus has caught up.
Magnus doesnt play the computermoves. He plays smarter. To play computerish against Giri and Caruana most likely will end in a draw, so to win its necessery to create imbalances, take chances and sidestep the mainlines. Magnus plays for victory, not for finding the computermoves. Therefore we can not say that the most computersimilar is the best.

Kasparov had the help of the entire Russian chess machine. coaches, nutrition, financial support, huge library, computers.
Fischer did it all on his own. nuff said. the most talented chess player of all time was bobby Fischer.
I agree

Kasparov had the help of the entire Russian chess machine. coaches, nutrition, financial support, huge library, computers.
Fischer did it all on his own. nuff said. the most talented chess player of all time was bobby Fischer.
I agree
Someone asked John Donaldson why Larry Evans did not continue as Fischers 2nd. in the match against Spassky. From what John said, Larry Evans wanted to bring his wife and Fischer said no.

Indeed. First off, Robert J. Fischer accomplished alot in his "short" career. More than anyone can claim, even Garry Kasparov. I will concede, as I have done numerous times, Magnus has a great chance of surpassing everyone. Especially in this age of engines.

That's funny, Bronstein.
Not funny, we actually dont know if he should or he shouldnt, not too much info, but for a dud of the 1500s, he was quite smart in his own way.

1480s ish I dont know dud, he was from those years.
David Bronstein didnt sell out, if you are talking about the 1951 WC.
Could you play your best knowing your dad is in a gulag, knowing that Botvinnik is the pet of the soviets, and that the corrupt Soviet chess machine could get irationally mad if you went on to win against Botvinnik?