After some days of testing, managed to OC my 8700K to 5Ghz with what I feel are great temps (not delidded) and with this configuration.
 
Multiplier x50
Voltage: 1,275V
LLC: 6
AVX Offset x49
 
Uncore multipliers: x40-x45
 
Mem not OC DDR4-3200Mhz 14-14-14-34 1T (maybe I'll try to make it nicer).
 
Machine is stable (in fact was one of my main goals), quiet and... cool (well... looks like I will need to delid it if I want to improve on temps).
 
Checked with Prime95, OCCT, HCI Memtest @1000%, etc Result is... It can fold without BAD UNITS nor nothing wrong for the last 36hours.
 
Critiques, improvements?

Your memory is at 2133 MHz, and I would recommend it to be at XMP or at least 2666 unless you are testing something or going all out CPU frequency on the extreme side. Essentially, its a good overclock, but your memory is at failsafe settings (XMP not enabled or set to 3200 MHz). Once you enable the XMP profile, you should be good to go!

CraptacularOne
As stated above your memory is not running at 3200Mhz, enabling XMP in the bios should fix that. Also using a folding client isn't really a determination of stability. Use Prime95 26.6 if you want to simulate a 100% CPU load without the AVX instruction set or use one of the later versions if you do. 

The folding client is not a good type of stress test as it is purely compute; My GTX 965M is stable at 1255 MHz max at 1.2V, while for compute, it can go to 1300, 1350, 1400, 1450, and 1493 MHz (I use them occasionally). Compute doesn't stress it out like games do, so test through games and benchmarks (like Intel XTU and 3DMark). Also, I don't think you should delid the CPU because you have already good enough performance (top of the line), and you can actually get the Intel Performance Tuning Protection Plan, while delidding the CPU kills that route since Intel will not warrant it even if it was done safely. However, if you don't care about warranty, feel free to delid it! I recommend using IC Diamond, or Conductonaut, but be careful with conductonaut since it is electrically conductive, and can ruin the on-chip capacitors which can short the CPU (in essence, be careful when delidding).