[Hedgemaster]

If you consider trading stocks only (no options) then right now your best shot would be Fidelity:

https://www.fidelity.com/

Interactive Brokers may allow to opt out of PFOF (both stocks and options) but only if you are a high net worth individual with like +1M in assets:

https://www.interactivebrokers.com/en/home.php

There is a mobile app that that would allow trading PFOF-free (both stock and options) but still in a pre-launch waiting list stage:

https://www.trystrikes.com/