What Type of Ducks do I have

[MTDewie2299]

I have 4 different type of duck that we got from tractor supply.
I know the two white are Pekins, but i have no clue the rest
I think the other light colored duck is a runner duck just by the way it stands.
Also genders would be helpful too!!!
Thank you

 

[Pyxis]

What you have appears to be two pekins, as you knew. The brown and white one could be a fawn and white runner, since you said it stands upright. The dark brown one is a khaki campbell. The other two are likely welsh harlequin drakes.