Mine:
Girls’ Last Tour Song of Raindrops ED
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.
ED from Keep Your Hands Off Eizouken! more for the music than visuals.
As mentioned in this thread Song of Raindrops and Koko kara, Koko kara are also good
Utsukushiki Zankoku na Sekai by Yoko Hikasa - Attack on Titan ED1. The melody is a startling contrast from the anime itself. Unlike the action packed and destructive anime, the song is gentle and pure, sad and foreboding, but with a measure of strength. Like someone (namely Mikasa, featured in the video) desperately fighting to hold on to something that will inevitably escape their grasp.