With all due respect, I would imagine that souls like those of the late Elie Wiesel, Primo Levi, and Billy Wilder were a lot more tortured. In fact, Primo Levi committed suicide and Billy Wilder had to yell "THOSE BASTARDS KILLED MY MOTHER!" at an actor whom turned out to be a Nazi sympathizer.
I say this as one whom, for example, suffers Depression, has a late-great-great-grandmother whose Bipolar Disorder and Post-Partum Depression effected her to suffer Alzheimer's Disease and die in her 60s, has a late great-great-grandmother whom suffered Schizophrenia (as did my late great-granduncle Bernie), was a pogrom survivor (along with my great-grandfather Anthony Czarnecki, whom had Depression and committed suicide), and lost relatives in the Holocaust; and I lost a cousin whom was murdered in the T4 Program due to having Schizophrenia.
But then again, perhaps, what do I know? Perhaps the suffering of Holocaust survivors and other Holocaust-affected people, pogrom survivors (including 4th-generation survivors like me) and other pogrom-affected people, and those with mental illnesses besides Vincent van Gogh meant and mean absolutely nothing. Perhaps Vincent van Gogh suffered worsely than any Holocaust- and pogrom-affected person would ever suffer by having lived and heard about as relatives were gassed, shot, stabbed, hanged, burned, and otherwise murdered; and any other person whom suffered Depression and mental illnesses. By the way, the Holocaust was in Germany as well as Russia, where Stalin implemented a "Final Solution" plan in 1948.
If I don't know whether Vincent van Gogh was "history's most tortured soul", though, then living fellow Holocaust survivors of Elie Wiesel et. al., pogrom survivors and fellow legacy bearers of mine, and others besides me and Vincent van Gogh whose minds and families' minds are and were afflicted by mental illnesses do.