You can’t forget about Noise Reduction. Your natural recording environment demands something be done to reduce background noise.
Your noises happen to respond to custom, by-hand reductions, plus stiffer than normal Effect > Noise Reduction plus the rumble filter as part of the regular AudioBook Mastering Suite.
You’re trying to record quality voice in the middle of a boiler factory.
I think this one is current.
https://forum.audacityteam.org/t/updated-de-clicker-and-new-de-esser-for-speech/34283/1
Noise Suppression affects sibilance, so don’t even think of correcting wet mouth noises before you resolve noise.
Special, custom, RMS-Normalize was designed to conform your work to one of the audiobook standards, pretty much no matter where you start from. People using the AudioBook Mastering Suite are warned not to ad-lib, leave things out or put extra stuff in. Each step is attuned to the others and all work in harmony.
It doesn’t work particularly well in your case because you’re recording in a boiler factory.
Koz