I'd also recommend the Intel Pentinum G3258 since it's basic as you can get but still has the potential and has integrated graphics. (By the way the socket is LGA1150)
As for RAM... if anything it sounds like you don't have much focus on aesthetics which means you can probably just go with Crucial RAM. Well.. it just does the job it was meant to do.
Your PSU will most likely work with a compatible motherboard to the Pentinum.
Okay, this is to answer the stock cooler thingy. You can still overclock with stock cooling, just not as much. You'll still definitely see a performance boost though. If you want absolute proof, look at Linus's video on the stuffies... here. In fact, I think you should just use this as your guideline lols.
https://www.youtube.com/watch?v=vbDiSMQ_L_k