Steve Reich-5

American composer Steve Reich uses Ostinatos in almost all of his music. He took piano lessons as a child and did not decide on a career in music until he was in college. He is considered to be one of the most influential composers of the 20th and 21st century, introducing the use of pre-recorded music in a concert and the use of ostinatos. He won a Grammy in 1990 and was awarded the Pulitzer prize for music in 2009.  Here are some examples of his music:

Different Trains - music for strings and recordings

So Percussion

Music For Pieces of Wood