My favourite is :
Evil Anakin
Darth Vader
Darth Maul
Boba Fett
General Greavius
Obi Wan Kenobi
Cad Bane

Kind of cheating but all of the clones from Domino Squad

But from a video game it would have to be Mission from KOTOR

The redeemed Darth Revan, his mask is epic!

Jar Jar Binks..

...said no one ever.

O7 The Republic Commando that we all know and love who got brutally murdered by 700000 robots.

Fett... Han Solo.. Chewie... Fett.

MESA LOVE JAR JAR BINKS. Okay though on a serious note jar jar binks was pretty funny even though he was the bottom falling out of everything and was the reason the emperor got elected and everything else who can't love his brash nature amidst the unintended comedy he delivers?

Mine is Obi-Wan. He's just awesome. He is also pretty much undefeated when it comes to dueling. He was only beaten by Dooku. Then Dooku was beaten by rage induced Anakin....Then rage induced Anakin was beaten by Obi-Wan. He only died because he let Vader do it.

I don't really think I can decide on ONE favorite. Obi Wan is good and all, but for the master of soresu, his defense was broken fairly often, but even so, he was a great Jedi Master. Yoda? To be honest, Yoda wasn't really that great of a duelist, because he wasn't creative at all in his application of the seven forms of combat. Darth Vader, despite his evil deeds as a Sith Lord, was a very well-rounded duelist and amazing wielder of the Force, likely only granting Luke the edge in battle when his Dun Moch tactic backfired and instead invoked a battle fury in his son. Plo Koon was also a great duelist, despite his very limited appearance in the movies. His perfected form 5 lightsaber combat had a defense only broken by physical strikes and force based attacks, the only things routinely breaking Obi Wan's soresu. And all of this is based solely on dueling skills, and goes to show that there is a large number of unique characters in Star Wars, each with their own backstories and abilities, and thus, I cannot choose a favorite. On a side note, Jango Fett is badass.

For comedy I would say Jar Jar Binks for jedi it would have to be Obi Wan.

Captain Rex. Like come on how do you beat him?

Jango and Boba Fett without a doubt, coolest characters.

Jedi: Obi-Wan Kenobi been my favorite for many a years and still is (though I didn't like Ben Kenobi as a kid lol)

Kyle Katarn: he is just so badass (except in JK3) in the Yuuzang Vong war (i think) he's pretty much Chuck Norris of the Jedi

Sith: Darth Vader

Neutral(ish): Galen Marek (Starkiller)

Clone Troopers: Boss, Sev, Cody and Rex

Other: General Grievous.

Bounty Hunter: Jango Fett and Cad Bane

Oh definitely Revan. Dude (because yes, canonically he is a dude) is a badass that take on armies of jedi or sith. It helps that I had some hand in creating the character's appearance in Knights of the Old Republic (oh yeah, spoiler alert for those of you how haven't played a 12 year old game, probably one of the best of it's time)

RC-1138—nicknamed "Boss" for his role as the leader of Delta Squad—was an incredibly gifted soldier. Scoring higher than most of his clone commando compatriots during his training on Kamino at a young age, Boss impressed his Mandalorian training sergeant, Walon Vau, with his prowess. Though a natural leader, Boss was relatively taciturn and often when he did speak, it was usually to issue an order to his squad. Boss had earned the respect and loyalty of his Delta Squad comrades, and did his best to repay their faith in him with strong, effective leadership. Temuera Morrison stated that Boss is the closest clone there is to Jango Fett.
I really like clones. especially the ARC troopers and Republic Commandos.

Hands down Kenobi the most selfless character imo and badass in his own way.

Hans.....SOLO. Biggest savage withing any galaxy

I'm gonna do it like William Lionheart and sort 'em in groups, 'cause I really, honestly, most definitely can't decide on a single one.

Jedi: At first I was going to say (write) Ahsoka Tano, but in the end it's Obi-Wan Kenobi. He was great every time I saw him. He was awesome in the movies, in the Clone Wars Series and in the games. Besides, his dancing skills are great.

Sith Lord: Darth Vader, hands down. Even before he was turned into a cyborg, his fighting skills were awesome. I really liked Anakin in Clone Wars and when he turned into Darth Vader in Episode 3, with his evil eyes and him just devastating anything and everything in his way ('cept for Kenobi). And his voice! Oh gods, the voice of James Earl Jones as Darth Vader is so gorgeus!

Sith: Definitely Starkiller. In both Star Wars: The Force Unleashed games he was badass, with his twin-lightsabers and him actually taking down a Star Destroyer by himself in one level. Also he was Darth Vader's secret apprentice, with one of the most badass nicknames I've ever heard.

Clone: Captain Rex. I mean, who else?

Bounty Hunter: Either Cad Bane or Boba Fett. Both look awesome, with Boba Fett wearing his cool armor and Cad running around with two pistols, a trench coat and his fabulous hat. They're also pretty cool themselves, with Cad Bane being a legitimately challenging enemy to the jedi in Clone Wars and Boba Fett being the same to pretty much everyone in the expended universe. Also Fett is german for fat, so that's funny.

Group: Zombie Stormtroopers. 'nuff said.

(Now, some of this stuff might be wrong. It's been very long since I played and/or watched anything even remotely close to official Star Wars stuff besides short videos and pictures.)

of the four you listed Chewbaca he was in more movies than all of them (4) but over all my personal favorite is Fordo (if you don't know who he is look him up)