Which game currently uses the most RAM, how much does it require, and is 32 GB sufficient or should I upgrade to 64 GB?

I'm currently using a 4K monitor, but I'm unsure whether higher screen resolution directly impacts RAM usage. Is there a correlation between resolution and memory demand? Given that I often game and multitask, how much RAM would you recommend—would 32 GB be sufficient, or should I consider upgrading to 64 GB for better performance and future-proofing?