Jeff "Swampy" Marsh
Although he worked on one of the greatest TV shows of all time as a storyboard writer for "The Simpsons," Jeff "Swampy" Marsh made his own mark in the animated scene with Disney's "Phineas and Ferb." He and series co-creator Dan Povenmire found great success with the animated comedy-musical show, which became the longest running Disney Channel original series.