I see where you coming from with Marciano but Marciano still had an easily better record than Wilder, the two are not comparable, really.
He beat guys like Layne or LaStarza in their primes and those guys would be better than any of Wilder's win so far, the "old guys" he beat too would be easily the best wins of Wilder's ever, those old guys being Moore,
Louis,
Charles and Walcott. None of them were shot to pieces when they lost to Marciano either, they beat legit dudes on their way to the Marciano fight even if they were past prime. Moore had a great series of wins before the Marciano fight, Walcott was coming off beating Charles twice, Louis though certainly past prime had a solid series of wins before Marciano...
It's true that he padded his record with gimme fights but who are we kidding here comparing his resume to Wilder's as some proof of double standards?
You can find much better examples of white privilege in boxing than comparing Wilder to Marciano