I personally like 'Jurassic Park' theme. It supposed to be terrying dinosaurs movie but that theme song is so tender and soothing which really shows how grand dinosaurs is.
If I have to pick theme song in love story with lyrics, I would pick 'Unchained Melody' from Ghost because it harmonizes perfectly with the story.
I know you are sick and tired of me going on about this film but anyway Enchanted is without a doubt has the best film score its so magical, very enjoyable and cute. Beauty & the Beast has a great score to as well as wait for it Tangled. And what does all these films have in common well yeah they are Disney films duh but it’s the one and only Mr Alan Menken who is without a doubt one of the best film composers of my time.