For now ( since some changes may happen but we have rerolls so it's k ) Here's the build i see the most in game for now :
Tanky pistol spammer : Random, but very dangerous, can be played with a few variants
Classic Avengers builds : Both quite tanky and dpsy, no wonder it's so popular.
Tank LSW : Almost like the avenger, very good damages, even more res ( no jet )
Assault Rifles : They act a bit as the small gun avenger, they have an impressive dps on everything ( thanks -35dr )
There's many more but i guess those are the most reliable, wich is a bit the problem with the fallout mechanics : reliability is sadly on the burst side.
If there's one you'd like to try, feel free to ask, i could test my "build making ability" ( maybe improve a lot with the forum advices
)