I've gotta say Jango is my #1. Not only did he hold his own against Obi-Wan Kenobi, but he also killed SIX Jedi knights with his bare hands, a feat matched by few.

Cad Bain was preeetttyy badass, but i think the fett man takes it on this one. He's been an all time favorite for many, including myself.

Embo! Badass Kyuzo bounty-hunter with a giant blaster-proof disc for a hat and a big ole' bowcaster. Second only to Cad Bane in terms of bounty-tally during the Clone Wars. 
Here's Embo in action!

I would choose Boba Fett any day.

You could call it a man crush

I believe it would be Jango Fett because he had the courage to fight Obi-Wan Kenobi and also Mac Windu

My favorite bounty hunter in the whole Star Wars universe is Shae Vizla. It is a fairly little known figure. He captivated me his exploits from trailer Star Wars: The Old Republic. And even if not the best bounty hunter is certainly she was the prettiest.

Boba Fett

That is why

Walon Vau. Only because he was the man to train everyones favorite 4 man killing machine

Durge, definitely would have to go with Durge. Dunno, just something about having a huge Gen'Dai at your side makes things a bit easier.

The one and only Jango Fett. Best Bounty Hunter imo.

I would pick Jango or Boba since they're obviously the coooliest but since everyone already said those 2 I'll go with Bossk. Something about trandoshans as bounty hunters that just fits, and for some he always stood out to me in the bounty hunter scene in episode V.

I don't wanna just go with Jango and Boba for the obvious choice but picking someone different I'd have to go with Cad Bane from the clone wars series.

im at a standstill between Cad Ban, and Boba Fett, Cad Bane has this western nostalgia going on and Boba Fett is a all around Bad Ass but after reading im still stuck between the two. While Watching Clone Wars Cad Ban has don some serious damage from his torture methods to his wits, he definitely takes the cake.

Definitely would have to be both Boba Fett and Cad Bane.

Like a Bossk.

I would go with any mado bounty hunter.

Always been a fan of Boba Fett. He was the first I saw and the most cool look I have ever seen. Always bet on the Fett XD

I'd have to say Dengar, he seems pretty badass, plus he's deadly to use in Battlefront

I'm a big Boba Fett always have been and always will be. He's just so damn cool I grew up thinking he was awesome and always wanted more from him in the movies cause his death was so dumb and way to fast/soon.

I would have to say Jango Fett,I've always liked his armor. Don't get me wrong Boba's is awesome but i always liked Jango more in general.