Well you are shifting the goal post. The general tone was universally classic.I'll let you have it on "critically acclaimed", but you can't fucc with "biggest"...
So yeah - Confessions is definitely one of the biggest albums of all-time "regardless of genre or classification",
and therefore it's not wrong for it to be mentioned in the same breath with those and (as other dude you quoted mentioned) Don't Be Cruel, Songs In The Key Of Life, and The Miseducation of Lauryn Hill.
Probably not Voodoo, though.
“Biggest” is trending towards sales and a lot of other metrics you are using to prop up your argument.