So to confirm what I'm hearing, even a model like the 5.5 gallon Makita MAC5200 that has a higher CFM (6.5 @ 90 PSI) than the Califorinia Air Tools CAT-10020C or Kobalt QUIET TECH 26-Gallon would still be lacking for impact wrenches, air hammers, and air ratchets because it doesn't have the volume of these two.
How much impact work are you planning on doing? I used a 4 gallon, 4 CFM compressor with an IR231 to remove an axle nut from one of my cars. No issue. Sure it doesn't take but 5 seconds to drain the tank so it needs to recycle... but that's plenty to free the bolt. It has no trouble keeping up with pulling 4 or 5 lug wheels since the time needed to refresh the tank is when I'm actually pulling the wheel off and setting it aside. It only takes 15 seconds for that compressor to cycle.
As for the air hammer I'm not as sure since I haven't used one with a 120V compressor. The air ratchet I'm less sure about. It probably wouldn't be good with a smaller tank but might be OK with the Kobalt. I suspect it uses more air than the pump can source but what's your use rate?
Anyway, of the ones you have mentioned I think the Kobalt would be my first choice. It's the same type of pump as the CAT. I have a CAT 5510A and it's not that well built. The Kobalt has a pretty good sized tank for a 120V compressor and the noise levels are, per the specs, about the same as the CAT. Do note that the "2hp" CATs are rated at something like 10db louder than the "1hp" models.
Just some food for thought. Per my sound level phone app (not exactly a calibrated setup) my 5510A comes in at about 70 db (not the 60 claimed but very easy to live with in the garage). The CAT 10020 is rated by CAT to be 10 db louder. So if we assume that is true then I would assume my phone would see it as an 80 db compressor. Not quiet but not too burdensome. My bigger compressor is a Campbell Housfeld belt drive 20 gallon compressor sold by Grainger similar to this
https://946e583539399c301dc7-100ffa5b52865b8ec92e09e9de9f4d02.ssl.cf2.rackcdn.com/7658/349430.jpg
The air filter housing was lost in a move so I replaced it with the updated factory version like this
https://www.sears.com/campbell-hausfeld-vh901700av-air-filter-w-element-vh3000/p-A015983114
I then added about 1 foot of clear vinyl tube just slipped over the intake snorkel of the air filter housing. (if you look at pictures of the CAT compressors they also have vinyl tubes stuck into the air intakes... they really do make a difference!).
https://www.acehardware.com/departments/plumbing/hoses-and-tubing/vinyl-tubing/4315578
Net result was my big compressor measured a bit less than 10 db louder than my 5510A. So, if CAT's ratings for the 10020 vs 5510 are correct my home brew setup was no louder than the 10020. The rubber hose made about 3-4 db difference and reduced the apparent noise quite a bit. So even if you get a different type of compressor, with changes to the intake you may be able to reduce the noise levels with low cost changes.
This video shows how much noise comes from the intake (DIY muffler to nothing)
And this one shows air filter housing to housing plus hose
Neither video is mine. The second is similar to my compressor but a different filter type (similar to what CAT uses). My only concern with the second is the vinyl hose is longer that I think it needs to be and it's smaller ID than the filter intake. I doubt my setup restricts intake air flow since my hose ID is larger than the filter housing intake. The tube in the second video is smaller in diameter as the tube OD fits into the air intake ID.