Immigrants from every corner of this planet have brought with them culture, science, arts and special labor skills that were shared with others to enhance innovation.
One good example is a Russian born boy that had a tremendous voice for theater, his name was Asa Yoelson. Asa, which later changed his name to Al Johnson. Al Johnson later became a popular singer during the 1920s and 1930s was a highly paid entertainer at that time. He brought his idea of Jazz and to an American music-loving audience and was a huge success within the American performing arts.
Other artists like Czech composer Antonin Dvorak who in 1892 was invited to come to the United States to direct the National Conservatory of Music and compose "American" music. His style of music captivated the American musical performance by storm.
African American musical artists like Benny Goodman and Artie Shaw were second-generation Jewish Americans who were inspiring musicians who mixed their style of Jazz with European traditional style and made it more exciting to listen too. Both artists were performing their music during the Jim Crow segregation era.
However, Immigrants did not only brought music and theater as their specials skills to offer but also brought cooking methods and flavor.
"...the classic American hot dog is probably the product of nineteenth-century German immigration. “Wiener” and “frankfurter,” synonyms for hot dogs, reflect the geographical origins of German sausage-makers: Vienna (Wien in German) and Frankfurt. Similarly, hamburger is the name for a native of the German city of Hamburg, which must have been the place of origin of the German sausage-makers who popularized chopped beef, formed into a cake and fried. Hamburgers, hot dogs, and other traditional American foods were popularized in the early twentieth century in “diners,” a distinctive restaurant style resembling railroad cars. Diners were commonly run by Greeks and other immigrants who found a niche serving low-cost food to the American masses."
From food to music and much more, immigrants have really contributed to American society making it the country it is today.
Reference
Gabaccia, Donna R. "We Are What We Eat: Ethnic Food and the Making of Americans" Havard. 2000
