Ren & Stimpy
This show was amazing for the first few years. If you don't know the history, the show was created by John Kricfalusi (John K.). In 1992, the New York Times said:

"The Ren and Stimpy Show ... may be the most original thing to happen to children's television since Pee-wee's Playhouse."

That same year, Nick fired John K. from The Ren and Stimpy Show. Bob Camp basically took over and the show has never been the same since. John K. was the voice for Ren. Billy West did (and still does) the voice for Stimpy. Now Billy West is the voice for Ren too. He's a great Stimpy, but a weak Ren, IMHO.

Below are a few scans I made.

Ren & Stimpy (45K)

Mr. Horse (34K)

Ren Hoek (38K)

Rubber Nipple Salesmen (39K)