What are you doing with it? Gaming, rendering, work related?
What is the rest of your system like.... PSU,GPU, RAM etc it is very hard to recommend one of these 3 good cpus if we don*t know what it for and if your system is compatible
A 2600x or 2700x are great for that GPU and RAM combination. With either of them you could also have an GPU upgrade to a RTX card with no problems (I have a 2700x with an Asus 2080 OC = awesome preformance). The 3600 would be better rendering and if you wish to upgrade your GPU in the next while but not more than 10% fps gaming, in short all 3 + the 2700x are well worth the money.
The Wraith Cooler that comes with is good but not the most quiet so it may be worth getting a different cooler depending on your case and airflow requirements.
Your PSU is ..... well..... not great..... for the love of all that is holy before you get the new cpu get a better PSU, yours is a fire hazard and the Ryzens do voltage spike and need a stable power platform.
Cheers