With so many manufacturers out there, adding new features for high-end TVs to limiting features on lower price point TVs, it is hard to provide a general list, however, most TVs share similar settings. The settings below are for general settings for manufacturers and will not be TV specific and alternate settings will be provided since some settings may not be available and will be denoted in (BLUE).
LG
Settings > Sound > Dolby Atmos > OFF (ON only if you have a 5.1.2 setup)
> Sound Mode > Standard
> Sound Out > HDMI ARC (keep SIMPLINK ON)
> Sound Out > Digital Sound Out > Pass Through (Auto if Pass Through not available)
> HDMI Device Settings > Auto Device Detection > ON
> HDMI Device Settings > SIMPLINK (HDMI-CEC) > ON
> HDMI Device Settings > Auto Power Sync > ON
> General > Power Saving Mode > OFF
> General > Quick Start+ > OFF
SAMSUNG
Settings > Digital Output Audio Format > Pass-Through (Dolby Digital, Dolby Digital+ or AUTO)
> Sound > Expert Settings > HDMI-eARC > ON
> Sound > Expert Settings > Dolby Atmos Compatability > OFF (ON if 5.1.2 or 3.1.4)
> Sound > Sound Output > External Speakers or HDMI-eARC
> General > External Device Manager > Anynet+ (HDMI-CEC) > ON
SONY(Android OS)
Settings > Display & Sound > Audio Output >
> Speakers > Audio System
> Device auto power off > Enable> Audio System Prioritizaion > Enabled
> Digital Audio Out > Pass-Through (AUTO)
> Dolby Digital Plus output > Dolby Digital Plus
> Pass through Mode> Auto
Settings > Channels & Inputs > External Inputs > BRAVIA Sync Settings > BRAVIA Sync control >
> Device auto power off > Enable
> TV auto power on > Disable
Settings > Digital Output Audio Format > Pass-Through (Dolby Digital, Dolby Digital+ or AUTO)
> Sound > Expert Settings > HDMI-eARC > ON
> Sound > Expert Settings > Dolby Atmos Compatability > OFF (ON if 5.1.2 or 3.1.4)
> Sound > Sound Output > External Speakers or HDMI-eARC
> General > External Device Manager > Anynet+ (HDMI-CEC) > ON