It helps him that he's maintained a very high level into his mid-30s, as the fact that he was a very late bloomer as a top player would otherwise be problematic (he shares this with Thiago Silva, although even Silva broke out about three years younger than VVD). But his late blooming makes it hard to assess him with regards to era. He's a 1991, which puts him in a weird spot between the really good mid-to-late 1980s CBs (spanning roughly from Thiago Silva to Hummels and Boateng, encompassing also Ramos, Pique, Godin, Chiellini, etc.) to the really good mid-1990s CBs (Varane and Marquinhos being the standard-bearers here). Who is his era? By the time Van Dijk broke out, Varane had been a top CB for 5 years despite being 2 years younger, but has now retired while Van Dijk is still at a top level. Van Dijk's late development curve means that he straddles "eras" pretty awkwardly.