Don't use dynamic contrast or peak brightness in SDR if you want the most accurate setting. Increase OLED light instead if you want brighter image. Of course, you can set it to what you enjoy watching, but just pointing it out.
I'm also using Clear Voice III with bass boost and Atmos. After much experimentation, I found this to offer decent surround effect and effects don't overpower the dialogues. Also, Netflix automatically plays 5.1 audio if it's available, so if you find the audio to be too low, you can change that to original, which should be stereo. However, with settings that I'm using, even 5.1 works but I have to raise the volume a lot; that's still easier to than changing audio to original for each episode or movie at the start.