>>64152256 (OP)
As many have already pointed out: knights were the dedicated anti-knight unit. Of course nothing is invincible and a few lightly armored and armed (ideally with some type of polearm) guys can take on knights as well. But the realities of medieval warfare changed much over the course of those hundreds of years and with that the available arms and armor.
>>64152313
Similar to the flemish urban militias who gave the french knights a bloddy nose: if one can secure an advantages position for himself while also forcing the enemy into a disadvantage on, the equipment really doesn't matter.
>>64154594
If seen a video of a hungarian youtuber who used early 16th century italian, german and hungarian sources about such two-handed battle swords. Here "counter-pike" efforts were briefly covered but most of the texts focused on guarding VIPs or areas.
Another source I know that supports the latter sort of deployment of those two-handed battle swords is pic rel: here the Landsknechte armed with Zweihänder are described to be the primary guard of the colors; only springing into action, when the formation of pikemen has been breached and the colors are directly threatened by the enemy
>>64155233
Being a Doppelsöldner isn't limited to being capable in the usage of the Zweihänder. Veterancy, having good equipment, being willing to take risks or being able to read and write also qualifies one for getting double the pay.