Best one-two punch...

[Azrael]

Toy Story 1 & 2

Terminator 1 & 2

Agreed.

Also, Hellraiser and Hellbound: Hellraiser II.
Robocop and Robocop 2. I quite like Robocop 2... I think that tone-wise Robo 2 is true to the satirical spirit of Verhoeven's classic, and it's even more bleak and hilarious at the same time. After that the films/series were turned into PG comic books.
Jurassic Park... One. Great first film, a dull and stupid sequel, a pointless third film that felt like a TV episode.

[Sandman]

Robocop 2 could have been alot better, The child villian ruined it for me though. Still way better then the 3rd movie.

[The Dark Knight]

Either:

Dr No/From Russia With Love

or

Goldfinger/Thunderball