Struggling to find mufflers

Quiet and no-drone and short small mufflers don't go together. The bigger the muffler, the less likely to be loud and drone.
Till I read your list, I would have recommended a quality turbo muffler or hemi muffler.
If you want a chambered sound, I'd get hooker Aero. I had a pair of 3.5 in/out on a nine second street car, I liked the way they sound.
Current car has looong 3" magnaflow straight thru, very quiet considering hooked to big block fenderwell headers and dumping in front of the rear tires.