For the sake of this discussion I'll break it into, White knight/Simp, the Gent, and the happenstance man.
Working from last to first, the happenstance man typically will see a woman in a situation of need and help; he has no motives, nor even contemplates there could be any ramification than being genuinely helpful. They will help just about anyone in need.
The Gent usually will go out of his way to help a woman as he has an internal code of honor. Now he won't go to extraordinary lengths once the situation has resolved, but he will have a paternal nature to how he thinks about a situation.
The Simp Knight will do anything thing he can to keep his presence around a woman known. He will see a female wanting something, and just give it to her to try and win favor. Basically they are a sex pest, who don't get sex, but think by buzzing around a woman's orbit he will eventually win the prize of her.
There are a lot of women on social media who will seek the Simp Knight, mostly to exploit their wallet. These "men" are more than willing to throw money.