I prepared them for myself but thought maybe others might find them useful so here they are. Exactly 1404x1872 , the devices original resolution and all converted to gray too for a bit of smaller file size. Although the filesizes are rather big because I used %100 quality for jpeg. There is a slight "problem", we can see some ghosting on almost all of the images , maybe it is because the original backrounds are a bit of black over white backround but these are mostly white over black backround. Still I am satisfied with what came out here. Hope someone here might like them too.
Mediafire link :
29 images, most of them are coffee related
Edit : To use them, simply copy all of the image files into the "Wallpaper" folder inside main memory.
Also if you want to see before downloading here are the photos :
https://imgur.com/gallery/jf5eOVe
SECOND batch added. See below to directly download :
DL link 2nd batch