Graphics Upgrade.. But What?

Hey guys, is me again! Your trusty scatter-brained Marti

I am thinking about upgrading the graphics card of my little Beastie in anticipation of a new game (hopefully released this year) and a new, better monitor (75hz is kinda.. sucky, I learned)
The graphics card he has now is a 2yr old 8GB ATI Radeon RX 570, mounted on an ASRock A320M-HDV R4.0 (AM4) (Ryzen 5, 2600) mobo.

With all the new tech going so fast, I once again cannot keep up on what works... Years ago it was much easier, it didn't move so fast and I had time to keep somewhat in the loop.. now I am just gathering the dustbunnies of all tech that has flown by XD

Aside of getting a new rig all together, what would be a compatible card for this beastie? He does his job, aside of the odd tantrum here and there.., so that he can cope with more demanding equipment / games?

Sincerely,
Marti