The gemara says in Bava Basra 123b that Yosef is the lahava and "sitno shel Esav" and the one who befells Esav as the posuk says "bais Yosef lahava".
The same person says in midrash Tanchuma Vayichi that all from Rochel are the fall of Esav derived from a different posuk.
So is Yosef in this way more than Binyamin?
What does "lehava" add? and if it adds is it only adding it to Yosef?
The torah says Yakov waits till Yosef is born (see gemara). How can it help Yakov if Yosef is only a child?
What actually did happen the one time Esav met his nemesis Yosef?