Here's my list of Great Harrison Ford Movies. He has been in so many over the last few decades, but here is my take on the Best Harrison Ford Movies:

American Graffiti
A classic slice of life of teenagers in 1962. American Graffiti seemed to capture the true feeling of kids enjoying the last day of freedom before heading out to college.

Star Wars Trilogy
Of course Star Wars was not Star Wars without the gruff and say it like you mean it Han Solo. Ford was a true star in this trilogy which will go down in history as the greatest sci-fi movie of all time.

Raiders of the Lost Ark
Han Solo or Indiana Jones, which character reached higher stardom? To have two major movie series with both characters becoming household names is something that does not happen in Hollywood too often. Although I loved Star Wars, I have to say Indian Jones is my favorite.

Blade Runner
As Rick Deckard, Ford is a Blade Runner, a cop who is tasked with terminating replicants, which are human clones. A timeless piece of work and highly regarded as one of the greatest sci-fi movies ever and one of the best Harrison Ford movies of all time.

Witness
A subtle movie filled with great mood and meaning. Witness shows the delicate balance between cultures and the dangers of crossing them.

Working Girl
The cast in the movie works so well, Ford together with Melanie Griffith and Sigourney Weaver create a seamless exchange. Easily Griffith's best performance of her life.

Indiana Jones and the Last Crusade
I skipped over The Temple of Doom in this list, it was a good movie but I don't think it is the same caliber as Raider of the Lost Ark and The Last Crusade. Bringing Sean Connery in to play Indy's Dad was a brilliant move, the two actors shined on each other.

Presumed Innocent
The emotion and mood created in the movie did the book justice and was one of the best performances by Ford.