The problem with this is that there is no 'one size fits all'...not even for socks... :B
The variety of TV's, their differing suspension architectures, the
variety of trailer architectures, variety of WD Hitch systems and a
BIG ETC....all have different dials, knobs and variables to know of
and account/adjust for
Then the vast amounts of opinions...highly aligned to be out in left field
That all work for 'each' adviser but not necessarily for the OP's seeking
advice/solutions
First, decide if you, the OP, believe in the OEM's ratings or the ratings
system.
If no, then this is academic.
If yes, then gather 'YOUR' TV's ratings info and learn how that system
works
The TV should have the amount or percentage or etc weight WD'd from
the TV's rear axle over to its front axle...as per the OEM instructions
Some list amount of drop from un-hooked to the amount of weight moved (WD'd)
On the trailer side...the tongue weight should be in the 10%-15% of
the actual trailer weight. I recommend closer to 13%-15%. Again, dependent
on the whole setup.
I'm on the side of leveling the trailer and even prefer/recommend
pointed slightly down
All 'good' WD Hitch systems has anti-sway designed in. Then the add
on friction bars, cams, etc to further enhance the anti-sway metrics
Suggest looking at the whole setup and the above as a 'goal' with
many, many dials/knobs that adjust to the end game of controlling
sway (AKA whipping back and forth)
Pictures of your components and setup would be helpful