Most people don't rate Wilder. It's because he beat hand picked C class opponents and avoided challenges.
Ortiz is certainly close A level and Washington and Breazeale verging B class, Duhaupas also. So he did beat better than C class and past it/bum cherry picks.
Ortiz is B minus. Old and his best win is Jennings. Gets hurt by every punch and and has no stamina. Washington, Breazele and company are C minus at best. Dupuah is a french chef, who boxes part time. Povetkin KOed him cold in a stay busy fight. When people talk about Povetkin they don't even mention Dupuah, but he is one of the best fighters Wilder beat.