I've got two compressors that would qualify, a CAT 5510A and an Emglo Dewalt twin tank 4 gallon with oil lube.
The CAT is quiet and thanks to the alloy tank light at 35 lb. However I'm not sure about the long term quality. Most parts are bottom of the barrel. I got mine really cheap because a seal in the regulator was installed wrong at the factory. The materials of construction are low grade and several have complained that parts break apart if you take things apart to fix problems. But very quiet. BTW, I don't think CAT actually came up with these quiet compressors. The first one I knew of was a GMC Cyclone (no relation to the automobile company). It was identical to the CAT 6 gallon compressor. Some of the earlier CAT compressors were just another variant of the low quality, made in China stuff you would find at the car parts stores. Kobalt, Campbell Hausfeld and others also have compressors with similar pumps (not sure which company actually makes the pumps).
The Emglo has a significantly higher flow pump but isn't much quieter than things like the Rigid and PC pancake compressors. Build quality is good. Starting current can be an issue in the cold if your wiring is substandard. This is actually the biggest complaint I've seen of the unit in reviews. When cold it doesn't tolerate voltage drops during startup. I was having issues in my garage untill I redid the wiring to the building. Quality wise the compressor is quite good or at least my near 20 year old version is.
