We use a Roku with an LG OLED, mostly to avoid connecting the TV to the internet. Turns out if you use the HDMI ARC for audio (we connected to a soundbar) and everything in the chain is new enough, then the Roku remote volume buttons will adjust the soundbar volume just fine. Roku remote can also turn the TV on and off, so we don't need the LG remote now except to change to a different input.

Are there any Roku TVs with EVO OLED panels?

The Roku remote controls TV power and soundbar volume just fine. CEC didn't seem to work quite right, so I enabled the Roku's IR blaster feature. The LG remote can control the Roku as well, through CEC.