also throughout the campaign zavalla gives you a choice of 3 weapons, AR, scout and pulse rifle. the scout is one of best in game for PvE, and is no slouch in PvP either. The AR is also top tier, so choose wisely. Pulse is not meta right now, but im sure when meta changes it might be good so its a 3rd choice.
Also running some strikes is good too because some of the vanguard weapons are best in class until you get raid shit so dont listen to peeps saying dont run strikes because useless. Like the rocket launcher for both PvP and PvE and fusion which is undoubtedly best in class tier PvP weapon. The thing is like a lazer also of course is the AR and scout too, depending on which you choose for zavalla reward.
Now meta on PC might be a bit different because of no aim assist, but im sure it will be close to console so weapons to keep an eye out for are...
Uriels Gift- High cal rounds laser stability and godly range for AR
Antiope-D- SMG primary with Kill clip perk. Rare drop from gunsmith, so keep an eye out. Best in class SMG.
Better Devils- Great hand cannon for both PvP and PvE, explosive rounds
The Old fashioned- great for PvP
Scatherlocke- High cal rounds and 600rpm and great stability for PvP
Omlon type sidearms. Last Dance, Last Hope... 3 burst variety which have the lowest TTK in PvP in game. People hate on people using them in PvP though because they require no fucking skill to use hehe.
Black Scorpion 4SR-Fast shooting scout, great for PvP rare drop from gunsmith.
For the faction rally, which will hit like week 2 or 3, go FWC, great AR, great hand cannon, and one of best energy slot scouts. now I had all 3 characters by that time so I chose all 3 for the fashion, but undoubtedly FWC has the best guns. I think Dead orbit has a good hand cannon which is like old fashion but a bit better, and New monarchy has best in class shot gun for PvP. All other shit is garbage.
But its a good idea to keep some of those shit tier weapons in the vault though because you never know. In D1, bungie liked to reshuffle the meta, buffing some guns while nerfing others to change shit up for PvP, so some of those trash tier weapons might turn into godly. But well see in D2.
Here is a breakdown of weapons and TTK and all that for those who like PvP...
Destiny 2 Massive Breakdown Weapon Stats Spreadsheet