I understand your desire to find that one nugget of truth in a big bucket of fakes, just that I offer a way to quick-screen: see, once troop trial pics become available, the quailty of truth in subsequent pics will improve to the level that it'd then worth the effort and time spent on them to discern its truthfulness, plus we'd then have more valid data to be used as baseline for fact-check.
The problem is that waiting so long and rejecting all possible evidence and waiting only for clear photos like what you're asking for is the equivalent of us rejecting the existence of J-XX/J-20 in the years before January 2011 because the threshold for evidence is too high, despite the plethora of other highly credible rumours and drawings and depictions of what the aircraft would look like.
I think our goal should be to pick up on new developments as early as possible. If that means having to use some brain power and critical thinking to differentiate real pictures from fake ones and to integrate some past knowledge into things to assess their credibility, then so be it.