Call of Duty: Modern Warfare (2007) and Call of Duty: Modern Warfare 2 (2009) were the ones I was most blown away by at the time of release.
But because of Neogaf's buzz around Infinite Warfare, I went back to it, and it's my new favorite. If that game had been released as a spin-off or a separate IP (call it "Deleted: Imminent Void" or something vaguely sci-fi like that), it would've been better received, and we'd probably have a sequel to it by now.
It's the most immersive campaign. The first few missions as Reyes are basically a "one-shot" with no cuts to other locations or times: You're in his shoes from the meeting with your commanding officer, walk down to check out Fleet Week, watch a terrorist attack, fight through the city to your ship, fly into space, space combat, dock on a carrier in space, walk to your captain's quarters, pick the next mission, walk to your ship to start the next mission...amazing.
it still looks great, too. Other than when you get too close to textures does it look any more aged to my eyes than Modern Warfare 3 (2023), and Infinite Warfare came out in 2016.