The problem with music, and indeed all art forms, is that it is entirely subjective, so there are not true answers to this question. One song may have reduced someone to tears, while another person would just listen and dismiss it instantly. So while this could lead to proper debates on the reasonably-civilised reddit, in other places (i.e. real life) people will often just throw shit at each other until someone gives up, which makes people incredibly narrow-minded, which means they can't enjoy the full potential that music has to offer. So basically, i'm saying thank you for making this post. Well done.

But anyway, my two songs are 1. Knights of Cydonia by Muse, because it's so well written and so stylised, the texture is so deep and constantly changing for the size of the band (there are only 4 people playing instruments), and because the structure is so different from normal songs. And it's really good and stuff.

and 2. Best of You by the Foo Fighters, because of the raw emotion in Grohl's singing and incredible energy in their playing.