He was also with The Simpsons, for its seventh and eighth seasons; after leaving he co-created The PJs, with Larry Wilmore and Eddie Murphy.
He worked on the following episodes: Josh Weinstein and Bill Oakley said that, with the exception of George Meyer, Tompkins had contributed more to seasons seven and eight than anyone else on the Simpsons staff.
He first pitched that Homer and Bart would encounter longshoremen, but it was too much work to animate the lading of ships, so a steel mill was used instead.
Instead of Homer, Bart, Barney and Moe going deer hunting and ending up at "Santa's Village" they would go back to the steel mill.
There, Homer would attempt to prove his heterosexuality by having a human tractor pulling contest with some of the steel mill workers.