I took a look again. In WT races, EC, WC or Olympics, that were contended by at least one of them, they were beaten by these riders:
Ballerini, Schachmann, Stuyven, Asgreen, van Baarle, Carapaz, Powless, Cosnefroy, Colbrelli.
However, Ballerini only beat Alaphilippe (his teammate), Schachmann only Roglic (who crashed badly), Powless only Alaphilippe.
So only Stuyven, Asgreen, van Baarle, Carapaz, Cosnefroy and Colbrelli managed to win a race of the highest category when more than one of these were present. I would therefor like to call them 6B from now on...
Stuyven, Asgreen and Carapaz each managed to beat three of them at once and thereby won MSR, Flanders and the Olympics respectively. Congratulations! I guess that's what you call world beater...
Interesting to see that Ineos, apart from Carapaz and van Baarle, didn't win a WT race where any of those six (well, actually it's more like 5...), were present. And the Olympics are not even a WT race.

So, slightly controversial statement... is van Baarle the best rider Ineos have?...

At least the wins of Yates, Bernal, Thomas and Porte all came where none of them were present.