That is the case though according to Rotten Tomatoes, at least at the moment. Black Panther currently holds the #1 spot on the top 100 movies of all time list, but it also holds the #1 spot in the top 100 action & adventure movies list.
If you look at either of these lists, you might notice that while Black Panther holds a lofty 97% rating, others below it hold higher ratings, with some even holding scores of 100%. Still, Black Panther comes out on top, and that is thanks to how Rotten Tomatoes defines their Adjusted Score. The Adjusted Score uses a specific formula that weighs in things like how many reviews a movie has. That formula is the reason why Black Panther, which has a 97% and 306 reviews comes out on top of something like Inside out, which has a higher 98% and 331 reviews.
Black Panther sits ahead of films like The Wizard of Oz, Get Out, Moonlight, and The Godfather on the all-time list, while it beats out films like Mad Max: Fury Road, Dunkirk, and Logan in the action and adventure category.
http://comicbook.com/marvel/2018/02/20/black-panther-ranked-best-movie-all-time-rotten-tomatoes/
Hahahahahahahaha! Suck it, Nazis.
Rank me as the best movie of all time if old