A:Answer Hello, Eric,
I also just purchased an OLED 4K TV that has the same requirements. I am using a CINNAMON Cable between my Blu Ray Player and my Receiver and a VODKA cable between my Receiver and my new TV with really excellent results.
You should be just fine with the Chocolate. Here is a statement from the Audioquest web site: " all AudioQuest HDMI cables up to 8 meters are guaranteed to exceed the requirements for all possible HDMI 2.0/HDCP 2.2 data streams, including 4K UltraHD, HDR, and Blu-ray Ultra HD." Your video quality should be excellent, The real difference with these HDMI cables that you will notice will be with your Audio.
Regarding Dolby Vision, that is taken care of in the processor in the TV and, if it is capable, your receiver. The cable will have no bearing on that capability.
I hope this is helpful.