Ennio Morricone created the spaghetti western sound for his work on Sergio Leone movies. Even if you're not a fan of old westerns, you have to admit the sound he created for those movies is incredible. The choice of using trumpets, voices, sound effects, and the relatively new electric guitar for a movie score was unheard of at the time and was used because the budget was too low to afford an orchestra.
I made my own little mixtape here because i found Morricone albums either run way too long (31 tracks!?) to actually be able to digest it or miss out on some key songs. So here is a selection. First track here, "The Ecstasy of Gold", is one of the best things i've ever heard.