Fin Fang Four

The Fin Fang Four were four monsters- Fin Fang Foom, Elektro (not Electro), Gorgilla and Godgam- that signed up to be hypnotized and "reshaped" so they could fit in society. Foom became a chef at the Baxter Building, Elektro became a mail man also at the Baxter Building, Gorgilla became a window wiper at guess where and Godgam become the B.B.'s parking attendant. But eventually they returned to their normal forms and teamed up to stop the now-gaint Tim Boo Baa.

References:

http://media.comicvine.com/uploads/0/77/137059-18723-110647-1-fin-fang-4_super.jpg
http://en.wikipedia.org/wiki/Fin_Fang_Foom
http://en.wikipedia.org/wiki/Elektro_(comics)
http://en.wikipedia.org/wiki/Gorgilla
http://en.wikipedia.org/wiki/Googam