First (according to the recommendation and because it was reduced) I pulled an Alphacool Eisbaer Pro Aurora 420 CPU AIO, but it didn't really fit into the case. Then I added a 'small' Arctic Cooling AiO cooler Arctic Liquid Freezer II 240. It's not high-end, but I can also manage with Baldur's Gate 3. 420 is IMHO overkill.

aorus waterforce 360 water cooling system

I had the Noctua NH15s on it. It was really very good, but I wanted an AiO. I am currently using the EK-Nucleus AIO CR360 Lux D-RGB and am very satisfied. Temperature is only 2-3 degrees cooler, but the system is a bit quieter. I have the processor running at the recommended 253 watts P1/P2, contact frame and a little bit servoed and am at 90 degrees max. without throttling. I'm very satisfied, but would check out the new Lian-Li Galahad II Trinity Performance 360.