Not just comedies, but more a list of stuff I miss from now and years ago.

Duckman
The Critic
Police Squad ("in color!")
News Radio
Tenspeed & Brownshoe
Beavis & Butt-head
Dead Like Me
Futurama
Nowhere Man
The Ren & Stimpy Show

And you can add Deadwood and Sealab 2021 to the list, too.