Mr. Haney – Green Acres. Much slimier than JR, who was, after all, really just that nice Major Nelson.
Sue Ann Nivens – The Mary Tyler Moore Show
Ed Sullivan
Eric Cartman – South Park
Evil Jeannie–"I Dream of Jeannie"Serena–“Bewitched” Egghead–“Batman” And a memorial tribute:Gen. Burkhalter–“Hogan’s Heroes” (Leon Askin passed on earlier this week)
Mr. Drysdale wasn’t the villain. Mrs. Drysdale was.
Adlai Niska - Firefly - creepy old bugger.
“Are you familiar with the works of Shan Yu?”
Alex, I’d like to take TV Shows for $400
Who are The Kupaki?
Hmmmm…Wasn’t Randall Flagg the bad guy in Stephen King’s The Stand?
Dr. Claw - Inspector Gadget (to a five-year-old, this guy was almost scary!)
Stewie - Family Guy
Evil Monkey - Family Guy
Randall Flagg is a recurring persona in Stephen Kings books, though, most famous for the Stand, where he plays the main antagonist.
Others:
Ming the Merciless from Flash Gordon.
Galvatron (Megatron’s new form) from Transformers Second Generation.
Dr. Clayton Forrester from Mystery Science Theater 3000.
Murdoc from MacGyver.
Racer X – Speed Racer
Col Klink – Hogan’s Heroes
Carol Merril – Let’s Make a Deal
All the Batman villians which would be another thread trying to name them all.
[voiceover] Speed doesn’t know that Racer X is really his older brother Rex Racer. [/voiceover]
I’m with you–Dan’s more anti-hero than villain. Remember what he did when he finally got Christine in bed?
The real villain in “Night Court” was Dan’s boss, District Attorney Vincent Daniels.
Wasn’t he the little person?
Yeah, that’s him.
Oh! Just remembered another villain: Harry’s rival in the joke-off.
I’m shocked that no one has mentioned my favorite
Baron Greenback from Danger Mouse.
Bill Orielly
I concur with many of the above, Eric Cartman, Lore, Zorak, Bob, etc.
I’d also list Stealth from “Sifl & Olly”. While he was justified in being angry at Olly, it wasn’t right to smoke or use foul language on a children’s puppet show. It totally popped the creative bubble. 
Nobody has mentioned Mr. Wizard yet. He seemed very grumpy, and the fact that he’s still alive means some satanic evil! :eek:
-d
Professor Whitehead from the Brady Bunch Hawaii episode.
Boris & Natahsa from Rocky & Bullwinkle.
The two person Axis of Evil right there.
mm