Saw it today as well.
I would rank it fourth after Star Wars, The Empire Strikes Back, and Return of the Jedi.
I liked Force Awakens very much, and probably the characters in Force Awakens were more compelling - especially Rey, Finn, and Po. However, the storyline in Rogue One was tighter, and that's a big deal for me. I thought the last half of Force Awakens was a let down; I didn't buy the whole Starkiller Base business or the rapid rise of the First Order and the mysterious Snoke or Snape or whatever that dude is called. Rogue One didn't have those kinds of issues, and it even cleverly tied up a few hanging chads from New Hope.
I hate CG characters, as a rule, which ruined the prequels for me, but the whole Tarkin thing I thought they pulled off brilliantly. I also approve of the Force Awakens like shout outs to the original series, including - holy shit - reusing footage of Red Leader and Gold Leader from deleted scenes in Star Wars! I thought they did this without too much winking and nodding at the audience, other than the requisite C3PO/R2D2 scene.
I also really liked the tropical location of the final sequence. This is a rather cool feature of the series, finding every imaginable biome and making a world out of it. Let's see, we've had desert (Tatooine), arctic (Hoth), jungle (Dagobah), redwood forest (Endor's moon), world-wide city (Coruscant), waterworld (Kamino), rocky badlands (Geonosis), and lava world (Mustafar). Now, Pacific Atoll world (Scarif).
I can't rank it quite as high as the original trilogy, because it just didn't have the memorable characters of even the Force Awakens. But it's a solid fourth for me, and I'm glad to have seen it. I will see it again.