For a low noise non-gaming machine, you don't need a huge heatsink. You do have to make a change in your beliefs, and that is to believe that it is okay for the CPU to run at higher temperatures, especially if it isn't overclocked. I see
threads like this quite often, where people are expecting unrealistically low temperatures.
Seriously. Leave power management running. Enable "Smart Fan" and set it to Quiet mode if given the option. Even the stock Intel cooler will be reasonably quiet. CPU running 85°C under load? That's fine. Most people don't run Prime95 or OCCT as productivity software. Idling at 60°C? That's fine. If the CPU gets borderline on temperatures, it will throttle and thus save itself.