Dog Catcher (Ren & Stimpy)

The Dog Catcher was an antagonist in "Big House Blues", the very first episode of the Ren and Stimpy show - as his name implied he was a parody of old-fashioned animal control officers and ran a pound that was run in an exaggerated, overly cruel fashion more akin to a prison.

Although technically doing his job as an animal control officer he is still considered antagonistic in regards to Ren and Stimpy as he captured and imprisoned them - luckily the two were adopted by a girl before they were put to sleep (unlike an unfortunate bulldog who was led to his death earlier in the episode).