Just to help narrow this down, I'm excluding the following from this list:
- Animated characters (otherwise I assure you Daria Morgendorffer, Sterling Archer and Homer Simpson would surely be here, and maybe some others like Rick and Morty too)
- Anyone from a show that is strongly adapted from a well known, pre-existing source material, so no superhero shows will be included here or anything like Ash vs. Evil Dead that is a televised continuation of a film series. I'm being more lenient with shows that are considerably different from their source material or are based on one that wasn't very well known up until the show began.
- Characters from a miniseries.
- Any more than two characters from the same series.
And without further ado...
10. Lorelai Gilmore (Lauren Graham) - Gilmore Girls
Good god was I impressed with how fast this chick could talk. I knew I would miss her the second the series finale was over, but I've still got A Year in the Life!
9. Spike (James Marsters) - Buffy the Vampire Slayer
He has one of the most surprising and interesting arcs of any character I can think of. He went from being a supporting guest villain in the second season to appearing years later as Buffy's main love interest. Through the good and the bad, he did change a lot throughout the series in various way, and I dig his sense of humor.
8. George Costanza (Jason Alexander) - Seinfeld
Short, stocky, bald and a born loser.
6 & 7. Tim Bisley (Simon Pegg) and Daisy Steiner (Jessica Stevenson) - Spaced
This is one of the most cleverly written TV shows of all time. The writers of The Big Bang Theory ought to hang their heads in shame.
5. Luke Danes (Scott Patterson) - Gilmore Girls
This guy just fucking kills me. Yeah, I love Lorelai and Rory Gilmore, but I actually appreciate his more toned down pop culture references and his frustrating interactions with the townspeople slightly more.
4. Gob Bluth (Will Arnett) - Arrested Development
He's made a huge mistake.
3. John Crichton (Ben Browder) - Farscape
A pop culture loving Earthling who finds himself way the hell out in the universe in a space opera setting? Any fans of Guardians of the Galaxy should do themselves a favor and check out this awesome series.
2. Buffy Summers (Sarah Michelle Gellar) - Buffy the Vampire Slayer
I'm probably something of a minority in that Buffy is my clear, no contest favorite character of the series. It seems that out of the show's many fans, most will pick a supporting character, but I simply love her Gellar's portrayal and her development throughout the series
1. Dennis Reynolds (Glenn Howerton) - It's Always Sunny in Philadelphia
The legend, THE GOLDEN GOD. Also a severely narcissistic sociopath.
Michael Bluth (Jason Bateman) - Arrested Development
Jake Peralta (Andy Samberg) - Brooklyn Nine-Nine
Rebecca Bunch (Rachel Bloom) - Crazy Ex-Girlfriend
Larry David (Larry David) - Curb Your Enthusiasm
Aeryn Sun (Claudia Black) - Farscape
Walter Bishop (John Noble) - Fringe
entire main cast - It's Always Sunny in Philadelphia
Ben Linus (Michael Emerson) - Lost
Al Bundy (Ed O'Neill) - Married...with Children
Jay Pritchett (Ed O'Neill) - Modern Family
Claire Dunphy (Julie Bowen) - Modern Family
Dwight Schrute (Rainn Wilson) - The Office U.S.
Jean-Luc Picard (Patrick Stewart) - Star Trek: The Next Generation
Data (Brent Spiner) - Star Trek: The Next Generation
Louie De Palma (Danny DeVito) - Taxi
Veronica Mars (Kristen Bell) - Veronica Mars