energy weapons and explosives would be a good start. As far as non-bulky power armor the least bulky I can think of is Enclave remnants Armor. If you have the Lonesome Road DLC the elite riot gear might be a good fit.
Laser weapons would be best. The standard Laser Rifle is a good all around weapon. The Gauss Rifle would be a good sniper rifle and fitting for Jango Fett. Close range the GRA Tri-Beam laser rifle would be excellent.
I suggest going for maximum critical chance with this character. Take the traits "Built to Destroy" and "Fast Shot" as the first gives you 3% more critical chance which may not seem like much but it can be multiplied by weapon crit chance multipliers, and the second gives you a great fire rate boost while the penalty isn't much of an issue given the tight spread of laser weapons. .025 spread times 1.2 is still a really tight spread.
Go for high luck. You want to max it out eventually. 1 point can come from the implant, while the rest can either come from the intense training perk (if you can afford to take it over other stuff) or you can gain 1 point by beating lonesome road, but that will be very far down the road.
This thread can give you some pointers : http://www.gamesas.com/topic/1466659-energy-weapon-critical-build-ii/
I also mentioned explosives because Jango and Boba Fett both liked explosives. They are also great for taking out crowds, or staging traps with mines.
Edit: Oh, and I just remembered that you should look into the unique laser pistol "Pew Pew"
Spoiler it does a lot of damage per shot, and was used by a bounty hunter like character. You can get it by collecting 50 sunset sarsaparilla caps that have blue stars in them, and then pay a visit to the old Sunset Saraparilla factory in outer vegas.