The Best CPU for _ is the one that meets your needs at the time you purchase and for n number of years following it. It used to be that you would just by the latest and greatest, over the last 30 years. Before the fairly modern day PCs (think before the IBM PC AT) you had to start with the problem you where trying to solve, then work your way backwards to figure out what you needed (a 16 oz hammer or an 8 pound sledge hammer for example). Figuring out what you needed included both the software and hardware - it did no good to purchase a program that ran on {M$|DR]-DOS if you where running a CP/M based machine, and don't forget that even back then you had the 68K series of chips from Motorola, RISC from IBM and others, and x86 from a number of manufactures.
So, what do you need a computer for? Checking emails and balancing your checkbook, maybe watching the latest cute kitten and puppy dog videos on YouTube? Get a cheap APU with built-in iGPU. You want something better than a gaming console to play games, then you don't need the latest and greatest, just something a few years old (PCs vs consoles and you see a five year old PC still whips a current day console), so something with four cores/threads will most likely work for you, even with a GTX 1060. Remember, right now, games are more restricted by the Operating System (OS) then almost anything else - DirectX has been a limiting factor for years, Micro$oft has not been able to keep it updated (ray tracing does not mean a thing if you can't do the basics, and DirectX does not scale well with the growing number of cores/threads in CPUs).
So, what do you need, and when do you need it? What is the availability at the time of purchase? Do you have to spend extra on an extra-large cooling system, and will the case you picked accommodate it? How about the motherboard? Are you going with HDDs, SSDs, or even NASs for storage, or some combination of all three? What about the GPU and display [monitor | VR | AR headset]? What operating system (OS) are you going to use - is its Mac OS (a modified version of Linux), a flavor of Linux, Windoze ??, Chrome OS, or something else?
So, how do you decide what is the best CPU for _? Do you base it on availability, price per core/thread, preformance per watt, how much it cost to just boot it up and keep it running, and do we include the price of the OS in that as well? What?