I'm shocked that isn't a household name. It slips right off the tongue, like a doe on a frozen lake.
It happens. Even if he composed scores for almost 150 movies in barely 26 years (according to IMDb), they didn't get as much recognition as for example Fistful of Dollars, which along with other Sergio Leone movies gave Morricone his current fame.
In a war it doesn't matter who's right, only who's left.