Perhaps a southpaw TKL or even a southpaw FRL TKL? I got into the 60% - 65% factor for the same reasons: the ergonomics feel much better with the mouse and keyboard both within my shoulder width.
I was impressed by the acoustics of my DR-70F with the PC plate, but hadn’t really considered that the larger case could have played a role. It’s definitely plausible in hindsight.