Hate to say this but the new fast and furious movie Fast 5 has been generally praised by critics as the best in the series. I wouldn't watch it myself but if you like action movies with chase scenes, apparently it's a pretty good one.
some of the actions movies considered to be good include, Die Hard (1988), The Dark Knight (2008), The Matrix (1999),Raiders of the Lost Ark (1981), Terminator 2: Judgement Day (1991), Bourne Identity, The (2002), Inception (2010), among others which you can learn about by visiting http://www.filmcrave.com/list_genre_movie.php.
A few that I have seen and really stood out to me are I am legend and Thor. I am legend tends to build tension more but is full of action.(also very sad....) Thor, well, when you see it you'll know what I mean. It was like I had never seen an action movie before.
I think the best ever action movies are Terminator 2, Broken Arrow Face Off Hard Target and in this category Terminator 2 is the best ever seen in history of cinema.Because we watched this movie first time we think that in future also there is no film will come like that means that quality and perfection