I am doing a solo dance for a highschool dance competition and need a lyrica/modern song. Any songs?

I want somthing slow and soft. I want a song that's not on the radio and that not a lot of people know. Songs that are similar to "Breath me" by sia, "colorblind" by the counting crows, "hometown glory" by adele and "gabriel" by lamb. I love songs that have pianos and violens also. Hope you can help me. :)