Or even simpler,
1. Get a decent air cooler or case that supports water cooling along with a decent 240mm or larger water cooler, since yours doesn't, and overclock.
2. Don't overclock.
Really, those are the two options you have as Dszymborski has said.
Not going with a Cryorig unit I can understand, but not because "they don't look too good". They have mostly backed out of the US market and the prices of their coolers, while once among the best in the industry, are now completely ridiculous.
Not wanting to go with Noctua on the other hand, there is only really one reason to not want a Noctua cooler and that is because they are too expensive for you. And if a Noctua cooler is too expensive for you, then overclocking is likely a hobby you should just forget about anyhow. There are ZERO air coolers on the market that can outperfom Noctua in terms of cooling performance AND noise levels, pretty much across the board. There are however still some other options out there that are nearly as good, for a little less.
As I asked before, what is your case model? What is your CPU model? What is your motherboard model?
Also, what country are you in? What is your budget for a cooler?