Damn you beat me to it! <iframe width="560" height="315" src="//www.youtube.com/embed/mWUhcKUYbT0" frameborder="0" allowfullscreen></iframe>
"Hurdy Gurdy Man" by Donovan at the ending of Zodiac, no question. <iframe width="420" height="315" src="//www.youtube.com/embed/eRQEUdpuQwM?start=170" frameborder="0" allowfullscreen></iframe>
<iframe width="420" height="315" src="//www.youtube.com/embed/dPly3e12ca8" frameborder="0" allowfullscreen></iframe>
Philadelphia Neil Young 1993 <iframe width="560" height="315" src="//www.youtube.com/embed/nHhke-qOu4Y" frameborder="0" allowfullscreen></iframe>
Promentory Trevor Jones 1992 <iframe width="560" height="315" src="//www.youtube.com/embed/iGz3XxDTsCk" frameborder="0" allowfullscreen></iframe>
<iframe width="420" height="315" src="//www.youtube.com/embed/WWMDfJEkQDs" frameborder="0" allowfullscreen></iframe>
Its premise may well be straight up sentimentalist garbage but Eternal Sunshine of the Spotless mind does have a somewhat classy ending: <iframe width="640" height="360" src="//www.youtube.com/embed/wsZSZ_vcCvA?feature=player_detailpage" frameborder="0" allowfullscreen></iframe> <iframe width="640" height="360" src="//www.youtube.com/embed/ZXwvW8bjJ8k?feature=player_detailpage" frameborder="0" allowfullscreen></iframe>