What about “It”? The pictures he painted in your mind of the evil clown and the hideous “spider monster” were second only to the depth of the characters, as they slowly remembered their battle as children against this same evil.
Sure, it requires a willing suspension of disbelief, but it’s a great story, if you don’t nitpick the plausability.
I agree that overall “The Stand” is his best work. I got the unabridged version a few years after I read it the first time, and it’s well worth a second read. It really fleshes out the characters in the extra two hundred or so pages originally omitted.