There are some movies with climax that just fills your heart and the elevates the experience altogether. You feel the movie really completes itself.
For me, in no particular order
Shawshank Redemption (almost everyone will have this one)
Taare Zameen Par
The Dark Knight Rises
12 years a slave
The lion king
Chennai Express (believe it or not I found SRKs fight sequence with the bigger dude awesome! The whole don't underestimate the power of a common man thing worked for me)
Agneepath (2011)(though im not a big fan of protagonist dying in the end but the Vijay character had the fate sealed for him)
these are the ones i remember, im sure i have missed many!