I am going to assume you know all the main ones such as The Princess Bride, Stardust, A League of Their Own and various romcoms, When Harry Met Sally, You Got Mail.

Here are some others that may have what you are looking for.

• Flow. It is about a cat leading a group of animals to safety during a flood.
• Good Night Oppy. It is the story of the Mars Lunar Landers and the amazing way they were used. It is incredibly inspiring, as is so much that NASA does.
• Marcel the Shell with Shoes On: It is a stop motion movie about a shell and damn it is so good.
• The Florida Project. This is an odd one, but it does have a lot of tackiness too it, but not in an overt way.