Wout kinda the same when he was viewed as one of the big 4 in cycling until recently.
That's the Big 6. WVA was never part of any Big 4. The original Big 4 was Froome, Contador, Nibali, Quintana, and the modern version is Pog, Vingegaard, Remco, Roglic. MVDP and WVA were added to make it the Big 6, but if any combination of those riders should be reduced back to four it would be Pog, Vingegaard, Remco and MVDP now that Roglic and WVA have declined. I might have seen that foursome being mentioned together a few times already.
I hardly know anything about tennis, so I can't contribute to that part of the discussion, but it's worth remembering that WVA was seen as at least on par if not more successful than MVDP for a few years. Up until MVDP's 2nd Ronde, I'd say. And then Van der Poel went on to greatly outshine Van Aert from 2023 onwards, which was coincidentally also when WVA dropped off a bit. WVA had three seasons (2020-2022) of being a complete beast and well-deserved of his Big 6 status. As for his palmares, it's clearly a bit underwhelming. He has been such a nearly-man. If he had turned just a few of those 2nd places in major races into wins, it would look so different. But he is obviously in last place in terms of palmares among his Big 6 companions.