Vettel is seen as an ‘exceptionally good’ driver so a Retro Vintage 70s 80s Style Newton, Iowa T Shirt yardstick for LeClerc. If he beats Vettel he is rated higher than when he was beating Marcus Ericsson in the Sauber back in 2018. Yet perhaps not as high as if he’d gone to Mercedes and beat Hamilton. So, if you are judged by your performance against the perceived level of your opponent then your best teammate is the one who is rated the highest. Even though Ricardo soundly outperformed Vettel at Red Bull I think Vettel (3 x World Champion) is still rated slightly higher than Ricardo. Bottas is interesting as he has at times outperformed Hamilton but I get the impression that Ricardo is perhaps rated ‘slightly’ higher than Bottas. So, the best Partner is Vettel, 2nd best Ricciardo and 3rd best Bottas. The only problem arises if, whoever your teammate is, he is outperforming you but it is ‘better’ to be outperformed by Vettel than by Riciardo.