I feel like a 'number 2' driver isn't automatically a 'wingman'. A wingman is intentionally the number 2 driver, knowing their job is to support number 1.
There's no way Webber was a wingman to Vettel.
Irvine and Barichello were very open about being at Ferrari to support Schumacher. Verstappen was very vocal about the support he got from Perez. (In '99 when returning from his broken leg, Schumacher made an effort to wingman Irvine... definitely the best driver ever to outwardly race in a 'support' role, even if it didn't really help)
Besides that, I think that Coulthard did a great job supporting Hakkinen. I don't think he saw himself as a 'Number 2' driver, but once it was clear that Mika was the contender, Coulthard played wingman.