i have difficult reading the standart name fonts of wow, i thought kuinameplates changed that. cant seen to change then though. ( im using elvui also if thats something )

Those aren't nameplates, and the font can be modified by changing files, however the size (and legibility) can't be increased. They can't be changed by addons.

However, you can make the game render nameplates for them - check the "always show friendly NPCs" option under /knp cvars. KNP can then modify them.