Yeah 6th gen onward are supposed to have the needed Intel Quick Sync Video components (or it starts with 6th gen and gets to full support for HDR 10 in 7th gen).
I went from i7-6700 to i7-7700k hoping that would be enough to get to stability. My family outside my network constantly crashed current versions of plex transcoding 4K to 1080p on the i7-7700k too though.
I landed on the bleeding edge 11th gen chips because even the 10th gen are still 600-series IHD ~ didn’t seem like I was getting a lot more QSV technology moving from 7700 to 8, 9 or 10th generation.
That’s my understanding anyway. Lots of posts in the forums about issues with 10th gen chips too.
@RoadRacer12 pointed me to this Wikipedia entry on Intel QSV which has a lot of interesting detail that summarizes the various info you can get from Intel ARK product info
If you can hold off for a while ~ might be worth it. You’ll get more capability and more stability.
Good luck! 
