What is supplying the HDR signal. You could always run any HDR source directly to your TV thus by-passing the Yamaha. If using a Blu ray 4K player then providing it has two HDMI out then one will go to the TV and the second would go to the Yamaha for full HD audio.
Think you need to give more information as to exactly you want. As for the Denon I owned one but audio wise, apart from Audyssey XT32 for room correction then it's more of a side ways move.