Any of them. I presume you’ll want to replace the GPU at some point, probably fairly soon, no reason to get a weak CPU to “avoid a bottleneck” just to get a different bottleneck later. Generally a GPU bottleneck is better to have since it’s cheaper and easier to upgrade a video card than it is to get all new motherboard+CPU and potentially new RAM.

Why are you using chrome?

Well you’re not gonna find anything after 9th gen that’s compatible with your motherboard. If you already have it and the CPU I wouldn’t worry too much about a bottleneck. There’s always going to be some kind of bottleneck, it’s unavoidable, and it also depends on how CPU intensive vs GPU intensive your workloads are.

If it runs fine that’s good, if you need to upgrade the CPU then it’s time for a new motherboard.

… did you forget to remove the sticker on your heatsink?

12100 is really cheap. 12400 isn’t bad today.

Even if you’re not overclocking, unstable RAM can cause lots of issues.

I don’t have any personal experience with ddr5 yet but at least on ddr4 a lot of XMP profiles had stability issues that were fixed just with manual tuning, but it’s different if your CPU doesn’t officially support it, too.