Most people dont think War and Peace was even Tolstoys greatest novel. Anna Karenina is regarded as the greatest novel of all time by lots of authors and critics though of course there is no consensus and its sort of a silly notion.
It's hard to pinpoint a "best," but I agree that this one (from Gravity's Rainbow) it quite, quite good, one I recall often.
Definitely the greatest line I've ever read. Such extensive imagery and metaphor (well beyond just the sky), tucked into 15 words.
"It was the best of times, it was the blurst of times."