Do the Taken War Earth quest line and pick the 1000 Yard Stare sniper as your reward at the end. It's not a god roll but it's damn close and as good a PvP or PvE sniper as you'll need.
You can also get a basically perfect PvP shotgun from another quest line (Conspiracy D w Rangefinder, performance bonus, and range boost in middle column). I think the Vanguard strike quest line?
For heavy just use Truth.
For primary, find a pulse rifle that suits you. You can use Red Death or Bad Juju but lots of people use the Iron Banner pulse Nirwen's Mercy that was sold w a ~God roll during the first IB. Gunsmith has also sold a great Suros PdX-45, Hakke Herja and Hakke Lyudmila. You can buy the Crucible vendor Hawksaw; it doesn't have an ideal roll but it's still good.
The upside of having missed your chance for the best legendary pulse rifles is that the weapon balancing patch is coming in a couple weeks. Nobody knows where the meta will settle
but odds are good pulses won't be the only game in town anymore.