Lemme know who else could feature in the list
youtu.be/q5_yBsex5yIRubinstein, Nimzovich, Keres, Bronstein
Korchnoi played in every candidates tournament from 1968 to 1982...maybe it was him
#8
But Korchnoi could never make it.
Rubinstein, Nimzovich, Keres got no chance.
Bronstein got a chance but according to some sources was forced to lose.
Nimzovich had a reputation though of messing up against the big guys...though he was probably one of the big guys himself