No no no, to be clear, his existence specifically is an outlier among outliers. He's definitely the most unique and unprecedented of us all, and everyone else is more like Rider or myself in terms of coherence.

Besides that, Avenger was only one of many Holy Grails. Rather, that term is used specifically in regards to a certain kind of large energy reservoir that has the programming of a Grail, and the one that he had become part of was the one in Fuyuki. My own Grail in my world has no trace of his corruption.