Useful weapons to grind for - I WILL UPDATE THIS EVENTUALLY.
Since this is a recurrent question, we decided to make a few suggestions on what are some good weapons for PVE you can try to get, specially if you are new to the game.
DISCLAIMER: We are not saying these are the best weapons ever for ever, just quite reliable weapons you can get by doing bounties or quests, not depending solely on luck. Very few activities require specific loadouts, and most activities that you will do can be done with whatever weapons your heart desires.
1. Izanagi
2. Izanagi
3. Izanagi
Kinetic
4. Exit Strategy
5. Wishender (get it to enjoy the weapon while it is still broken)
6. Blast Furnace
7. Austringer
8. Tranquility (hopefully with firing line)
9. Imperial Decree (if you can get one to drop with trench barrel)
Energy
10. Riskrunner
11. Python
12. Kindled Orchid
13. Ikelos Shotgun (you can´t mod it, but it is a good shotgun if you didn´t get anything else yet)
Heavy
14. Wendigo
15. Whisper of the Worm (specially for use while you finish up getting your Izanagi's or haven't obtained Divinity or Anarchy yet)
16. Hammerhead
17. 21% Delirium / Edgewise (either or)
Special cases
18. Recluse (energy)
19. Mountaintop (kinetic)
Both Recluse and Mountaintop are weapons that require a tad of PvP and aren´t exactly easy to get, although it´s not as hard as it used to. They are worth it, if you don´t hate PvP with all your gut.
Random drops
20. Spare rations (kinetic)
21. Sole Survivor (energy – try getting one with Firing Line)
22. Last Man Standing (energy – try getting one with 1-2 punch)
23. Bug out bag (energy)
We included a few random drops that can be farmed, meaning they will drop from activities you can do over and over again. Again, we aren't saying these are the BEST ones, but right now they are good options.