A verbose, rambling answer FWIW:
Having seen the games you like, I have some vague ideas.
The best pre-built PC, is not a specialty of mine. So, FWIW, some generalities that might help one choose among pre-built PCs. I’m an AMD fan – but, I’ll try to be objective
For gaming
above 1080p using a 1440p (2K) or 2160p (4K) monitor, the CPU is not the bottleneck because both AMD and Intel perform similarly. In that case, up to date AMD CPUs generally perform equally or better than Intel for the money – assuming similar base clock speeds and core counts. If gaming at 1080p, the fastest Intel CPUs give slightly higher FPS (but its only “measurable” not “visible”). Moreover, I’ve noticed that pre-built AMD powered PCs are cheaper than similarly performing Intel powered PCs in most cases (but, I don’t spend a lot of time looking at pre-built).
So, AMD CPU for performance and value. However, the pre-built you like best might be Intel. No big deal – both are good.
For FPS at 1080p, AMD and Nvidia provide good GPUs. Buy based on price/performance. Above 1080p, FPS fans would want one of the more expensive Nvidia GPUs – $500 to over $1000.
These days, 16GB of DDR4 PC memory for gaming. That’s up from just 8GB not so long ago. 32GB is not needed – only a couple games even make us of it.
You did not mention monitor. I think the monitor is a big deal when figuring out a cost effective gaming system. I bought a 43” 4K television to use as a gaming monitor. Cost only about $280 at the time. I have a costly piece of hardware that accurately measures color reproduction – its virtually perfect on that inexpensive 4K LED TV. Downside is maximum 60 fps and only 1000/1 native contrast. Still, I’m happy with it versus a smaller gaming monitor – I want resolution, excellent color, and an eye filling screen. These days an excellent QLED 43 inch TV can be had for around $600 more or less depending on sales – gives 120FPS with a high end GPU. I’m waiting for the “holy grail” – a 43” OLED 4K or 8K TV (perfect native contrast and color) – no OLED TV screens below 49” yet. I think if one is willing to spend over $500 on a GPU they should spend over $500 on a large screen 4K monitor or TV (personal preference).
Tom’s hardware has a few articles on how to pick out one’s next gaming machine. Also, if you come across a pre-built you might like -- Google it.