Many good suggestions made so far. For PVE vender version Hung Jury is superb in my opinion and very hard to beat for a legendary. Especially since this allows an exotic special or heavy to be used. For PvP I still have not found my perfect primary in year 2. I have or have had every primary available in the game except Doctrine and so far nothing feels like the perfect PvP primary to me. Mida comes close though. Keep just trying the different weapons and good luck.