Bought an LC-Power Cosmo Cool LC-CC-95 as a cheap way to get a heatsink. The quality of the include fan did not concern me, as I planned on using the be quiet! fan that I'd used in the Wraith Stealth fan replacement.
The CPU and case fans were kept running at full speed during testing. However I didn't disable everything I should have for a proper test. Perhaps that's why there's a dip in the frequency. The measurements where taken with HWiNFO (approximately every 3 seconds).
Replacing the Wraith Stealth heatsink with that of the Cosmo Cool, resulted in a 14°C lower max temp and 100+ MHz higher average core frequency for the Ryzen 3 2200G's when running Prime95.