I see you have the Radsone EarStudio ES100 relatively high on the list. I haven't yet seen any 3rd-party measurements for that one. I read here that you haven't established a protocol for evaluating wireless products. That does open up a big can of worms for a category that likely doesn't Venn-diagram well here; measurements with psychoacoustic lossy codecs are difficult to contextualize. LDAC is as close to non-perceptual as it can currently go, without a wire. That said, the ES100 also integrates a USB DAC @ 16 bit/48 KHz, so that might fit in.
However, I am very interested to see how it measures against other budget amplifiers that also advertise the ability to drive 300 Ohm loads (ES100 with the balanced 2.5 mm output, 2x voltage limit). The FiiO E10K doesn't claim to do it, but I and some others have had middling success driving the HD 650 with it. I'm also using a Magni 3 with the Topping D10 as a source. The Schiit Fulla 2 is yet another potential comparison.