Alan Silvestri, Back to the Future Theme
(p)3332cb / 6441 / T4P / 2H / 4kbd / str

https://www.nkoda.com/playlist?ref=189f9008-34f5-41e4-8a3b-3be0a8cd95ff 

Nick Reyland has put a video together about Silvestri's film score and refers to some of his other film music, including The Avengers.  He also talks about some of the key components in the Back to the Future Theme and includes some clips from the film.