Demo Weiss DAC 204 incoming for a home trial. If it does what I'm hoping it does, I'll get a 205, as that has all the features (few) that I need.
Honestly surprised that more brands don't offer this feature. Not everyone wants to run their DAC straight into a power amp.
BTW, for the sake of this list, Okto offers a customizable option for fixed output level, 1V to 8V, but it's baked in at the factory and not changeable thereafter (unless, I suppose, you send it back to them).