Yeah the 4770k had a really wide range of possible clock speeds, I've seen some members struggle to pass 4.2Ghz!
Either way most were able to do 4.5Ghz one way or another. If you're unable to stabilize it, it might be time to delid. Haswell and the refresh really didn't like thermals past 80c or so and once you passed the sweet spot it would take gobs of voltage to get it stable. I also have a 212 (poor decision, I was new) and it's keeping me from passing 4.7Ghz.
Finding games is a real chore these days huh? lol
There are several games coming out that seem great. Resident Evil 2 just came out, hopefully we'll get ports for Red Dead and Kingdom Hearts. Anthem looks like a great game too (and it's one of the reasons I upgraded from my 4690k with 8Gb).
Black Ops 4 is actually done really well for PC which is a nice change. Cyberpunk 2077 will launch this year too.
Don't forget to OC your cache.