Definately Jango. I mean you can just tell by being a star wars fan, but if it need be broken down, here we go.......
Jango vs Montross= i think we all know what will happen,and did happen there.
Jango vs Jaster= well since Vizsla kills jaster, and Jango kills Vizsla, i think that shows he better. Also, Jango has a lot more skill than jaster, some things are just so.
Jango vs Boba= Let's see. this would be his only challenge. They are the same person(genetically). They both have their own sperate skills though. It's a tough one to call, but jango was a lot faster, and taught lil' boba everything he knows(just about). I think Jango would take him.
Jango vs Canderous= Give me a break.
In a last man standing battle.....Jango and Boba team up until the end, where Jango kills Boba, not so easily, but gets the job done.
Jaster trained Jango in every sense, and he was only killed because the di'kutla sheb traitor Montross left him in the midst of many, many opponents.
Definitely Jaster.
Ok but Jango being trained doesnt mean he cant surpass him, and in my opinion he does, by far. Ok not to sound cheesy, but just watch the movie. look at how fast jango is. and smart and etc. he beats up on obi wan pretty bad. and kills coleman trebor like he was playing a video game. you could also look at it by who killed them. jaster-vizsla(who was then killed by none other than jango) montross-um...yeah canderous(im not sure, im not WAY into EU stuff, mostly movies, but i dont remember him dying) Boba- as far as i know he isnt dead, but han bested him many a time. and jango- MACE MUTHER F'N WINDU. come on now.......Jango is amazing..dooku dont pick just anyone to be cloned into a zillion people and fight for the republic now does he? if you look at the facts,and think in your head, and just come to your senses, youll realize that jango is the clear victor here....no doubt about it.
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk