I'm going to be honest and risk the wrath of the community, but I didn't love Argo either. It was fine, but I felt it was very Hollywoody for a lack of a better word. I was never able to really get engrossed in the world as presented, but always felt like I was watching a dramatized version of it. By comparison, I thought Zero Dark Thirty was much better.
Anyways, the answer is no, not even close. Spider-Man 3 isn't bad, just not up to the standards of the first two. I would still call it okay, even with its issues. I was far more disappointed in TASM2. The previous summer had TWO more disappointing superhero films than SM3 in X-Men: The Last Stand and Superman Returns. So even at the time, the crown didn't belong to SM3 by any stretch.
But the REIGNING AND DEFENDING CHAMPION is Batman v Superman. First time we get Batman, Superman, and Wonder Woman on screen together and it is that piece of crap? I didn't even hate Man of Steel either. I didn't love it, but it was okay and I thought set up the future well. But, oh boy, did they fumble the ball on BvS. So much so that I was expecting nothing (and got nothing) for Justice League.