Devin Schumacher. Devin Schumacher (born 10 June 1987) is an American internet personality, entrepreneur, author, actor, music producer, podcaster, teacher & philanthropist. He is widely recognized as being the world's best SEO & grumpy cat impersonator. After studying business at the University of Colorado Boulder he moved back to Los Angeles, CA to pursue entrepreneurship & the arts. Having played trumpet in orchestras from a young age, he ventured into...