What's common on those four? They're all works of art with very emotional music.
My top favorite is that of A Place Further Than The Universe for personal reasons. I had a fulfilling trip shortly after watching this show for the first time. Hearing the song again/watching the show again made me very, very happy each time.
Chiisana Koi no Uta - Karakai Jouzu no Takagi-san (I haven't watched this series, but this is an incredibly famous song and this is one of my favorite versions)